Physics Brawl Problems and Solutions

2025

Online

Mowing

Problem Solution

Different period

Problem Solution

Playing with gas

Problem Solution

Fast serve

Problem Solution

Old power supply

Problem Solution

Firmly connected mathematical pendulums

Problem Solution

Icy cold LED lights

Problem Solution

Lost gas

Problem Solution

Brokenly charged

Problem Solution

Creative DnD Hero

Problem Solution

Staircases in Atomium

Problem Solution

The strength of LED strips

Problem Solution

Skipping pizza

Problem Solution

Voltage on the voltmeter

Problem Solution

Radar operator problems

Problem Solution

Spinning electrons

Problem Solution

Overturned outhouse

Problem Solution

Potassium cube

Problem Solution

Thermodynamical pulleys

Problem Solution

Wired wheel

Problem Solution

Particles

Problem Solution

Modified solar system

Problem Solution

Harmonical friction

Problem Solution

Tense oscillations

Problem Solution

Bizzare yo-yo adventure

Problem Solution

Falling square

Problem Solution

Ion thrust engine

Problem Solution

Action scene with motorbike and truck

Problem Solution

Water turn

Problem Solution

Chasing the Sun

Problem Solution

Gas flow

Problem Solution

Warming up by work

Problem Solution

Lever–pulleys

Problem Solution

A straw

Problem Solution

Waging a war with windmills

Problem Solution

Conducting corner

Problem Solution

Ftl

Problem Solution

Speed of a shadow

Problem Solution

Heavenly bowling

Problem Solution

Leaking liquids

Problem Solution

The cosmos getting far, far away

Problem Solution

Underwater light

Problem Solution

Hmm, where did i put that?

Problem Solution

Racing against the rain

Problem Solution

Blowing up a balloon reloaded

Problem Solution

A spring and a magnet

Problem Solution

Underwater light reloaded

Problem Solution

Thermodynamic lottery

Problem Solution

Giant metronome

Problem Solution

Charged hoop in a sphere

Problem Solution

Easterly

Problem Solution

Thermal neutrons

Problem Solution

Attractive Petr

Problem Solution

The fullest spoon

Problem Solution

Faraday’s collector

Problem Solution

Escape across a frozen dam

Problem Solution

B.1: Mighty power bank in action

Problem Solution

B.2: Heavy charging

Problem Solution

B.3: I don’t have the capacity for that

Problem Solution

B.4: (in)efficient powerbank

Problem Solution

P.1: Knocking the opposing boule away

Problem Solution

P.2: Slowing our ball down

Problem Solution

P.3: Scattered balls

Problem Solution

P.4: Scattered balls reloaded

Problem Solution

R.1: Telescope illumination

Problem Solution

R.2: Shining on a teaspoon

Problem Solution

R.3: Reflector off the focal point

Problem Solution

R.4: Spotlight at full power

Problem Solution

2024

Online

Fair sprint

Problem Solution

Rail problem

Problem Solution

In the shadows

Problem Solution

Run as fast as you can

Problem Solution

Water resource engineering

Problem Solution

Cooking up acid

Problem Solution

Planespotting

Problem Solution

Formula car on the ceiling

Problem Solution

Warming up a baking tray with pendulum

Problem Solution

Diproton bids farewell

Problem Solution

Accelerated deceleration

Problem Solution

A cracked bottle

Problem Solution

Big guitar bang

Problem Solution

Road on road

Problem Solution

Pulleys with blocks and friction

Problem Solution

Increasing the degree of polarization

Problem Solution

Warmer background

Problem Solution

Combined

Problem Solution

Laser lunch

Problem Solution

Garage doors

Problem Solution

Who would fear a buoy

Problem Solution

Rolling glass of ice

Problem Solution

Delicious fuel

Problem Solution

Infinite resistance

Problem Solution

Live broadcast

Problem Solution

Periodic deflection

Problem Solution

Use crosswalks

Problem Solution

Shot at a better future

Problem Solution

Hanging phone

Problem Solution

Concentric spheres

Problem Solution

Measured gas

Problem Solution

Weather watching

Problem Solution

Overpriced taxicab

Problem Solution

Pressurized bubble in oil

Problem Solution

Dramatic escape

Problem Solution

Endless resistance ii

Problem Solution

Dipole on a spring

Problem Solution

Not-so-warm water

Problem Solution

Hourglass

Problem Solution

Rectified efficiency

Problem Solution

All the same

Problem Solution

Suspended

Problem Solution

Border hill with a lookout tower

Problem Solution

Loose ring

Problem Solution

Double detection

Problem Solution

Back to the U-tube

Problem Solution

Acceleration of an idealized car

Problem Solution

Fishing

Problem Solution

The oppressed air

Problem Solution

Optimally excited quantum oscillator

Problem Solution

X.1: Floating solar sail

Problem Solution

X.2: Solar sail on the way to the stars

Problem Solution

X.3: Solar sail on the way to the stars ii

Problem Solution

X.4: Solar sail on the way to Mars

Problem Solution

H.1: Air under water – simplified to the maximum

Problem Solution

H.2: Air under water – very simplified

Problem Solution

H.3: Air under water – less simplified

Problem Solution

H.4: Air under water – still simplified

Problem Solution

M.1: First ride through Blanka

Problem Solution

M.2: Riding through Blanka... Maybe...

Problem Solution

M.3: Changing speeds in Blanka

Problem Solution

M.4: Riding through Blanka... Pirate style

Problem Solution

2023

Online

Rotating a force

Problem Solution

Five-second rule

Problem Solution

Game of tag

Problem Solution

Changing the transmission lines

Problem Solution

Swimming problem

Problem Solution

Slide

Problem Solution

Jarda’s problems

Problem Solution

Irresistibly attractive

Problem Solution

Flying droplets

Problem Solution

Stealing with a spring

Problem Solution

Radiocarbon dating

Problem Solution

Curious cyclist

Problem Solution

Carrying a box

Problem Solution

Divider No.1

Problem Solution

Steel sphere floats

Problem Solution

Modified solar system

Problem Solution

Pulleys with elastic rope

Problem Solution

Falling clothes horse

Problem Solution

Acoustic speedometer

Problem Solution

The Synchrotron in Grenoble

Problem Solution

Maximal pétanque

Problem Solution

Taxidermy of a cylinder

Problem Solution

Rats on rats

Problem Solution

Postmodern art

Problem Solution

Ice in a cube

Problem Solution

When will I be there?

Problem Solution

Insidious horn

Problem Solution

Incorrect voltage

Problem Solution

Banded archerfish

Problem Solution

Digging up

Problem Solution

Echoooooooooooo

Problem Solution

Maximal activity I

Problem Solution

Immersing

Problem Solution

Frog on a water lily

Problem Solution

Relativistic star

Problem Solution

Billiard

Problem Solution

Impedance spectroscopy

Problem Solution

Small hole in the water balloon

Problem Solution

Changing of our star

Problem Solution

Top of the class

Problem Solution

Pressure difference

Problem Solution

Fireworks

Problem Solution

Electron collision

Problem Solution

We want to breathe on Everest

Problem Solution

A lake on a mirror reloaded

Problem Solution

Coin funnel

Problem Solution

A point jumps over a cuboid

Problem Solution

Oscillating lens

Problem Solution

Epic fail

Problem Solution

Intermittent voltage

Problem Solution

Van Allenovi is just bright

Problem Solution

Flying mud

Problem Solution

Maximal activity ii

Problem Solution

Mišo is shooting

Problem Solution

Red Wednesday

Problem Solution

Pumping water using water

Problem Solution

A beer problem

Problem Solution

K.1: The pendulum swings back. . .

Problem Solution

K.2: . . . And forth. . .

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K.3: . . . And back. . .

Problem Solution

K.4: . . . And forth, over and over again

Problem Solution

T.1: Inflating a balloon

Problem Solution

T.2: We are cooling down the balloon

Problem Solution

T.3: Our balloon has flown away

Problem Solution

T.4: Connecting balloons

Problem Solution

M.1: Tram

Problem Solution

M.2: The tram reloaded

Problem Solution

M.3: Parallel tracks

Problem Solution

M.4: Turboflies’ troubles

Problem Solution

2022

Online

My hand is slipping off

Problem Solution

Comparison of slings

Problem Solution

Mountain biking

Problem Solution

Hunter, shoot yourself

Problem Solution

Falling icicles

Problem Solution

Worn tire

Problem Solution

Drop Da Bomb

Problem Solution

Moving bridge

Problem Solution

Two rectangular cuboids on a hill

Problem Solution

Energy-saving electric kettle

Problem Solution

Induced voltage reloaded

Problem Solution

Archimedeskugeln

Problem Solution

Neglecting the Earth’s movement

Problem Solution

Hot light bulb

Problem Solution

Bead with spring

Problem Solution

Ballad of a sinful soul

Problem Solution

Is that what you meant, Mr. Planck?

Problem Solution

Red-hot resistance wire

Problem Solution

Golf on the hill

Problem Solution

Rubberband around the corner

Problem Solution

Level sensor

Problem Solution

Mountain biking reloaded

Problem Solution

A pit with pulleys

Problem Solution

Effective trapezoid

Problem Solution

Race against time

Problem Solution

Escape across the frozen lake

Problem Solution

Heating the helium

Problem Solution

Tropical climate

Problem Solution

The Pit and the Pendulum

Problem Solution

Magneto-resistor

Problem Solution

Wheel against the direction of travel

Problem Solution

Too high frequency

Problem Solution

Attention, the window is falling

Problem Solution

Blocks on top of each other on a plane

Problem Solution

Long power line

Problem Solution

A ball for Jáchym

Problem Solution

Polarization as far as it goes

Problem Solution

Dog walking

Problem Solution

Ordinary estimate of mean air height

Problem Solution

Modern art

Problem Solution

Maze of resistance

Problem Solution

Screen resolution

Problem Solution

Wired

Problem Solution

Electromagnet

Problem Solution

Ladder

Problem Solution

Mushroom hunting

Problem Solution

A ball for Jáchym reloaded

Problem Solution

Up and down

Problem Solution

Revenge for the machines

Problem Solution

Water in a bowl

Problem Solution

Where to hide?

Problem Solution

Reading against the light

Problem Solution

Rattlesnake 11

Problem Solution

Spring with friction

Problem Solution

Central spring

Problem Solution

Foggy glass

Problem Solution

Matěj’s black warm box

Problem Solution

M.1: Fast and even faster for the first time

Problem Solution

M.2: Fast and even faster for the second time

Problem Solution

M.3: Fast and even faster for the third time

Problem Solution

M.4: Fast and even faster for the fourth time

Problem Solution

E.1: Light circle

Problem Solution

E.2: Planparallel lens

Problem Solution

E.3: Two magnifiers

Problem Solution

E.4: Recording ants

Problem Solution

X.1: We are cleaning up the garden

Problem Solution

X.2: Watering the garden

Problem Solution

X.3: Winding the cable

Problem Solution

X.4: Swinging cucumber

Problem Solution

2021

Online

An unfortunate trolleybus

Problem Solution

Our antique clock

Problem Solution

Flywheel

Problem Solution

Roofing

Problem Solution

Spring in an airplane

Problem Solution

Focusing light

Problem Solution

Induced voltage

Problem Solution

A constant atmosphere

Problem Solution

Molar mumble

Problem Solution

Don’t lean out of the windows

Problem Solution

A healthy mind in a healthy body

Problem Solution

Insidiously smoky

Problem Solution

An electron source

Problem Solution

Is it cold outside?

Problem Solution

Battering ram

Problem Solution

Night-time thermodynamics lesson

Problem Solution

Moving pulleys on a wagon

Problem Solution

Beware of the fountain

Problem Solution

Beryllgläser

Problem Solution

Filling the bathtub

Problem Solution

Lipno and relativity

Problem Solution

The intersections of Lissajous curves

Problem Solution

Conductor in a hurry

Problem Solution

Height does not matter

Problem Solution

The hollow Earth has many variants

Problem Solution

An oscillating pulley

Problem Solution

One increased, the other increased too

Problem Solution

Doppler on his way home

Problem Solution

Psoon

Problem Solution

On a beach

Problem Solution

An oscillating hoop reloaded

Problem Solution

Finite circuit

Problem Solution

An inclined roof

Problem Solution

Ommatidium

Problem Solution

Thermodynamic cannon

Problem Solution

Center of gravity of a snail

Problem Solution

Very thirsty

Problem Solution

Rotary capacitor

Problem Solution

Inevitable fall

Problem Solution

Life is short

Problem Solution

Radiant

Problem Solution

Anti-reflective glasses

Problem Solution

Dano is flying to an exoplanet

Problem Solution

Platform 9 and 3/4

Problem Solution

A ride on the exponential

Problem Solution

Carousel ride

Problem Solution

Catapult

Problem Solution

Too many cubes

Problem Solution

We work by pulling

Problem Solution

Snowball to a window

Problem Solution

A bottle on a swing

Problem Solution

Washbasin

Problem Solution

Bottle on a swing reloaded

Problem Solution

Minimisation of acceleration

Problem Solution

M.1: The boat

Problem Solution

M.2: The boat reloaded

Problem Solution

M.3: The boat revolutions

Problem Solution

M.4: The boat resurrections

Problem Solution

E.1: Discharging a capacitor

Problem Solution

E.2: Conductive chewing gum

Problem Solution

E.3: Cheap voltmeter

Problem Solution

E.4: Coil on a base

Problem Solution

X.1: I’ll pull her down with me

Problem Solution

X.2: To the bottom of the dam

Problem Solution

X.3: An unknown ball in an unknown fluid

Problem Solution

X.4: Attractive

Problem Solution

2020

Online

(hopefully just) easy pulleys

Problem Solution

Two circuits

Problem Solution

Felling trees

Problem Solution

The nearest asteroid

Problem Solution

Unstable

Problem Solution

Safe power

Problem Solution

The ink-blooded prince

Problem Solution

Slowed down train

Problem Solution

We pump oil

Problem Solution

Homogeneous air

Problem Solution

Our old clock

Problem Solution

Cough cough

Problem Solution

Uneven illumination

Problem Solution

Autumn in a train

Problem Solution

The power of a waterfall

Problem Solution

Burning coal

Problem Solution

Heat and phases

Problem Solution

Boiling

Problem Solution

Internal resistance

Problem Solution

Raft voyage

Problem Solution

Mysterious ball

Problem Solution

Illuminated

Problem Solution

A ball

Problem Solution

A traveler’s problem

Problem Solution

A different parallel-plate capacitor

Problem Solution

Oscillating hoop

Problem Solution

Oscillating

Problem Solution

Lego and dice 1.0

Problem Solution

Lego and dice 2.0

Problem Solution

Impact accelerator

Problem Solution

Jump on!

Problem Solution

Disgusting piston

Problem Solution

4D scouring pad

Problem Solution

Levitation by firearm

Problem Solution

Burning phosphorus

Problem Solution

Mixed current

Problem Solution

Stopping a train

Problem Solution

Solar cube

Problem Solution

Optimal direction

Problem Solution

Watch out, Danka is throwing

Problem Solution

Laser at a dormitory

Problem Solution

Pyramid

Problem Solution

Pole dance

Problem Solution

A fall into the unknown

Problem Solution

Spring of knowledge

Problem Solution

An incredible space battle

Problem Solution

Rotational pump

Problem Solution

Ideal centrifuge

Problem Solution

Falling impulse

Problem Solution

A problem with potential

Problem Solution

Another problem with potential

Problem Solution

M.1: At the train station

Problem Solution

M.2: At the airport

Problem Solution

M.3: Under the ground

Problem Solution

M.4: In the shopping mall

Problem Solution

E.1: Statistical 1 - intro

Problem Solution

E.2: Statistical 2 - basics

Problem Solution

E.3: Statistical 3 - the quantum way

Problem Solution

E.4: Statistical 4 - the second quantum one

Problem Solution

X.1: The strongman and the weight

Problem Solution

X.2: (not) breathing

Problem Solution

X.3: The pressure of a ballerina

Problem Solution

X.4: Saliva

Problem Solution

2019

Online

Inconspicuous escalator

Problem Solution

Long day

Problem Solution

Pair of pipes

Problem Solution

Lost heat

Problem Solution

One hundred

Problem Solution

Archer

Problem Solution

Strange eclipse

Problem Solution

Neglect causality

Problem Solution

Fun with RLC

Problem Solution

An unfair race

Problem Solution

Humber Bridge

Problem Solution

Jumping

Problem Solution

Spider-spider

Problem Solution

Is it colonizable?

Problem Solution

Dan’s fléche burnt.

Problem Solution

One hundred reloaded

Problem Solution

Lazy electron

Problem Solution

Charge in a box

Problem Solution

Helix

Problem Solution

Charge inside a cylinder

Problem Solution

African Sun

Problem Solution

Red hot nickel... Cable?

Problem Solution

Hanging here

Problem Solution

Doggy

Problem Solution

Ethanol emissions

Problem Solution

Jump into the unknown

Problem Solution

Rolling cone

Problem Solution

Pulleys

Problem Solution

Small torque

Problem Solution

Asteroid with impact parameter

Problem Solution

Defective spherical mirror

Problem Solution

Quantum Kepler

Problem Solution

Tense tree

Problem Solution

Slim line

Problem Solution

Overheated flywheel

Problem Solution

Looping

Problem Solution

Bumps on the road

Problem Solution

Speed merchant

Problem Solution

Slowly thrown rock

Problem Solution

Aesthetic balls

Problem Solution

Disgusting resistive skyscraper

Problem Solution

Manoeuvre

Problem Solution

Capacitor grid

Problem Solution

The fourth velocity

Problem Solution

Inside a spherical mirror

Problem Solution

Rotary tree

Problem Solution

Neutron rack

Problem Solution

Sunbathing session

Problem Solution

Diabolical spring

Problem Solution

The charge and the pentagram

Problem Solution

M.1: Rick’s microplanet

Problem Solution

M.2: Interdimensional density

Problem Solution

M.3: Squanchy frisbee

Problem Solution

M.4: Wubba lubba dub dub

Problem Solution

E.1: Breakers

Problem Solution

E.2: Fykonacci

Problem Solution

E.3: Triangular ladder

Problem Solution

E.4: Nonlinear FYKOS-bird

Problem Solution

X.1: Chernobyl

Problem Solution

X.2: Hold my graphite

Problem Solution

X.3: Not great, not terrible

Problem Solution

X.4: Radio-activity

Problem Solution

2018

Online

Underground

Problem Solution

Passing trains

Problem Solution

Let’s play a game

Problem Solution

Keep pulling or I’ll whip you!

Problem Solution

Theophist temperature

Problem Solution

Stairs

Problem Solution

Hockey-football problem

Problem Solution

Resistive block

Problem Solution

Queen’s justice

Problem Solution

Scuba diver

Problem Solution

Fifty

Problem Solution

Watch out for the turn!

Problem Solution

Planck linear density

Problem Solution

Drop velocity

Problem Solution

Giga-cave

Problem Solution

Compound bow or semiautomatic pistol?

Problem Solution

Twice as stiff spring

Problem Solution

A warm-up hurricane

Problem Solution

Rain

Problem Solution

Throwing balls

Problem Solution

Shadow

Problem Solution

Elevator acceleration

Problem Solution

Kevin the Cube

Problem Solution

Chained

Problem Solution

Cork problem

Problem Solution

Olive one

Problem Solution

Paťo is doing sports

Problem Solution

Energetic pendulum

Problem Solution

Einstein with Cherenkov

Problem Solution

Two-state problem

Problem Solution

Spacey

Problem Solution

One-third train

Problem Solution

Marble on a spiral

Problem Solution

Olive two

Problem Solution

Dan’s eggs

Problem Solution

A motivational capacitor

Problem Solution

A calm place

Problem Solution

Finally a complex infinite circuit

Problem Solution

Vertical shelf

Problem Solution

Olive three

Problem Solution

Elastic loop

Problem Solution

Astronaut training

Problem Solution

Exotic field

Problem Solution

Identifying a rod

Problem Solution

Doublets

Problem Solution

Stellar sail

Problem Solution

Throw over a cylinder

Problem Solution

Evil spring

Problem Solution

M.1: Dyson

Problem Solution

M.2: Dyson Reloaded

Problem Solution

M.3: Dyson Reloaded Reloaded

Problem Solution

M.4: Dyson Reloaded3

Problem Solution

E.1: Oh, these batteries

Problem Solution

E.2: Inner resistance

Problem Solution

E.3: Solar panel incident

Problem Solution

E.4: Transforming

Problem Solution

X.1: Purely fractal

Problem Solution

X.2: Just fractal

Problem Solution

X.3: Quite fractal

Problem Solution

X.4: Very fractal

Problem Solution

2017

Online

Tough run

Problem Solution

Electrobell

Problem Solution

Jump

Problem Solution

There’s a current flowing

Problem Solution

A mirror problem

Problem Solution

Supercooled water

Problem Solution

Ecological

Problem Solution

Headshot

Problem Solution

Transportation acceleration

Problem Solution

Closer than it seems

Problem Solution

Soda

Problem Solution

Don’t fall!

Problem Solution

Shoot it down!

Problem Solution

Young’s thermal stress

Problem Solution

Rubber bands

Problem Solution

Bungee jumping

Problem Solution

Fidget spinner

Problem Solution

Insect in amber

Problem Solution

Swung rod

Problem Solution

Deviated

Problem Solution

Slinger

Problem Solution

Energies of rotation

Problem Solution

The Ripper

Problem Solution

Inhomogeneous

Problem Solution

Jáchym-style

Problem Solution

Drop the gallium into hot water

Problem Solution

Another infinite circuit?

Problem Solution

Medal

Problem Solution

Dyson sphere under construction

Problem Solution

Too many cylinders

Problem Solution

Do I hear that?

Problem Solution

We’ll be there in no time

Problem Solution

Boring laboratory routine

Problem Solution

Loud music

Problem Solution

Football player

Problem Solution

Water over gold

Problem Solution

Unbent, unbowed, unsunken

Problem Solution

In the rain

Problem Solution

Fire up the synapses

Problem Solution

Efficient ride

Problem Solution

Hot day

Problem Solution

All the way up, please

Problem Solution

Shower

Problem Solution

Space race

Problem Solution

Gray plates

Problem Solution

Do not drown!

Problem Solution

Pressure cooking

Problem Solution

Thirteen barrels

Problem Solution

Space cowboy

Problem Solution

Pressure cooking reloaded

Problem Solution

Balls of steel

Problem Solution

M.1: Tic-toc

Problem Solution

M.2: Far from school

Problem Solution

M.3: Not falling well

Problem Solution

M.4: Don’t fall at all

Problem Solution

E.1: Breaking a capacitor

Problem Solution

E.2: Ideal voltage

Problem Solution

E.3: Ideal current

Problem Solution

E.4: Loaded triangle

Problem Solution

X.1: A nice cup of tea

Problem Solution

X.2: Cheesy

Problem Solution

X.3: Yoghurt

Problem Solution

X.4: Beer

Problem Solution

2016

Online

Librarian’s problem

Problem Solution

Tough slice of bread

Problem Solution

Curve

Problem Solution

Astral

Problem Solution

Don’t mind the tune

Problem Solution

Little cubes

Problem Solution

Methane

Problem Solution

Do it tomorrow

Problem Solution

Toricelli reloaded

Problem Solution

Effectiveness evaluation

Problem Solution

’murican

Problem Solution

From Prague to Brno

Problem Solution

And the Sun in Ophiuchus means that. . .

Problem Solution

Bounce from zero

Problem Solution

St. Elmo’s sphere

Problem Solution

Under pressure

Problem Solution

Long drop

Problem Solution

Microrotation

Problem Solution

Perfectly balanced

Problem Solution

Sine

Problem Solution

Chain reaction

Problem Solution

Ready steady

Problem Solution

It hangs – it hangs

Problem Solution

Eccentric travelling companion

Problem Solution

Cuboids up in the air

Problem Solution

Tuning

Problem Solution

Aloha snackbar

Problem Solution

Burst

Problem Solution

Damped oscillation

Problem Solution

Don’t stick your fingers in!

Problem Solution

Dark planet

Problem Solution

Crash

Problem Solution

Just a little closer

Problem Solution

Chain reaction ii

Problem Solution

Newton’s rings

Problem Solution

Short circuit

Problem Solution

Exoplanet

Problem Solution

Tse-tse

Problem Solution

Throwing peas at the wall

Problem Solution

Wire

Problem Solution

Hydrophobe

Problem Solution

Distributed

Problem Solution

Merry-go-round

Problem Solution

Twin paradox

Problem Solution

Vampirectrical

Problem Solution

Focus

Problem Solution

Sisyphean labour

Problem Solution

Spin it

Problem Solution

All day long

Problem Solution

Comfy by the pond

Problem Solution

Toast

Problem Solution

Saw

Problem Solution

You shall not transmit!

Problem Solution

Transit

Problem Solution

Megamagnet

Problem Solution

M.1: Tower builder

Problem Solution

M.2: Tower builder returns

Problem Solution

M.3: Collision imminent

Problem Solution

M.4: Stick like no other

Problem Solution

E.1: Charged Fykosák

Problem Solution

E.2: Náry’s hoverboard

Problem Solution

E.3: Astonished Náry

Problem Solution

E.4: It’s freezing

Problem Solution

X.1: Odysea and Prometheus

Problem Solution

X.2: Who’s gonna survive

Problem Solution

X.3: The winter, again

Problem Solution

X.4: Tiler

Problem Solution

2015

Online

Misbehaved students

Problem Solution

Plastered block

Problem Solution

We’re on a roll

Problem Solution

Cooling

Problem Solution

Wet road

Problem Solution

High five!

Problem Solution

(non)broken thermometer

Problem Solution

Line of apsides

Problem Solution

The fire rises

Problem Solution

Sunny

Problem Solution

The potassium foil

Problem Solution

Tuned

Problem Solution

Pitch-black

Problem Solution

Pyramid

Problem Solution

Battering ram vol. 2

Problem Solution

Refracter

Problem Solution

The Long Night

Problem Solution

Thick glass

Problem Solution

Wrong slope

Problem Solution

Minimal force

Problem Solution

Laser pointer

Problem Solution

When to stop a catapult

Problem Solution

Alternating-direct 1

Problem Solution

Tick tock

Problem Solution

Sleepyhead

Problem Solution

Martian

Problem Solution

Nitrogen suffocates the audience

Problem Solution

Exoplanet

Problem Solution

A hideout on the Moon

Problem Solution

Melted down thermistor

Problem Solution

Rotation rotation

Problem Solution

Superpowers

Problem Solution

Ball-ey

Problem Solution

Diodes

Problem Solution

Gardener’s problem

Problem Solution

A merry encounter

Problem Solution

Achilles and the tortoise

Problem Solution

This problem sucks

Problem Solution

Bursting with rage

Problem Solution

Alternating-direct 2

Problem Solution

Ambulance

Problem Solution

Transmittors

Problem Solution

Homemade maglev

Problem Solution

Accretion is too mainstream

Problem Solution

Wavy electron

Problem Solution

Rising bubble

Problem Solution

A charged spiral

Problem Solution

Washing the dishes

Problem Solution

Amplifying

Problem Solution

Watering

Problem Solution

M.1: Submarine

Problem Solution

M.2: Wet FYKOS-bird

Problem Solution

M.3: Water pump

Problem Solution

M.4: Rocket bird

Problem Solution

E.1: Trinity

Problem Solution

E.2: Náry brawls with numbers

Problem Solution

E.3: Náry works hard

Problem Solution

E.4: CapacitOr

Problem Solution

X.1: We’re expanding

Problem Solution

X.2: fiat lux

Problem Solution

X.3: Christmas

Problem Solution

X.4: Antichemical

Problem Solution

2014

Online

Thoughtful

Problem Solution

Ded Moroz

Problem Solution

Fiat nox

Problem Solution

The runnier, the better

Problem Solution

Brake failure

Problem Solution

Fungus librariensis

Problem Solution

Server not found

Problem Solution

Archimedes drowned

Problem Solution

Carriage on a blind track

Problem Solution

Driving in rain

Problem Solution

On your own drive

Problem Solution

The most important letter’s centre of mass

Problem Solution

Sulphuring the barrels

Problem Solution

To jump, or not to jump

Problem Solution

Tea at five

Problem Solution

Scary shopping

Problem Solution

Feed a castle

Problem Solution

Bullet

Problem Solution

Watermelon

Problem Solution

A superconducting one

Problem Solution

Buoyant swings with a pulley

Problem Solution

On the head

Problem Solution

An infinite circuit

Problem Solution

Bowling with a physicist

Problem Solution

Waves and wavelets

Problem Solution

Rolling cylinder

Problem Solution

Zdeněk’s sphere

Problem Solution

Energetic surface

Problem Solution

Pyramid’s circuits vol. 2

Problem Solution

Gassed joules

Problem Solution

Elusive lens

Problem Solution

Playing in the field

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Planet Fykosia

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Feather-light

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An accelerated one

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Resistance upside down

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Nomen omen

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Pendulum

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Magnetic focusing

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Slingshooty

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Little gifts

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Van de Graaff

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M.1: Electrical shopping cart

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M.2: Náry’s academic quarter

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M.3: Truly solid lecture notes

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M.4: All in vain

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E.1: The long one and the wide one

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E.2: One, two, three,...

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E.3: Experimental afternoon

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E.4: Pyramid’s circuits

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X.1: Uncertain bacteria

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X.2: A lecture on relativity

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X.3: Hot grating

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X.4: Beta decay

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2013

Online

Jumping dog

Problem Solution

Source of radiation

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fluctuational

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Czech energetics

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Fall one

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Choo choo train

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Collision!!!

Problem Solution

Semicircular analyzer

Problem Solution

Upgrade

Problem Solution

Let there be equality

Problem Solution

Apple cider

Problem Solution

Wien’s filter

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Pseudo-ice tea

Problem Solution

Climbing acetone

Problem Solution

The round one

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The bulb and the capacitor

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The rod on the wires

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Totem

Problem Solution

Solar mania

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A decaying one

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Thermo-sphere

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Analogue hydrometer

Problem Solution

Pressurized box

Problem Solution

World champion in high jump

Problem Solution

Pulleys

Problem Solution

Boxed light

Problem Solution

Enlightened carriage

Problem Solution

Earth-cylinder

Problem Solution

Pass me the hammer

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A messy one

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Valuing the decays

Problem Solution

Flash

Problem Solution

We need to go deeper

Problem Solution

Little skewer

Problem Solution

Tesseract

Problem Solution

Short hands

Problem Solution

Resistant Fibonacci

Problem Solution

M.1: Stilettos

Problem Solution

M.2: Traffic jam

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M.3: Very slow relativity

Problem Solution

M.4: Splash

Problem Solution

E.1: flash

Problem Solution

E.2: Tangled resistances

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E.3: Aberration

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E.4: Useless work

Problem Solution

X.1: Let’s spread out

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X.2: Heating season

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X.3: Hexagonal sphere

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X.4: firm or springy

Problem Solution

2012

Online

Curtain

Problem Solution

Hangmen

Problem Solution

Blue rock

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Gas block

Problem Solution

Marble play

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Springy one

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Expandable balloon

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Resistant prism

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Satellite

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A loop

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Ecologically passive

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Nucleus on a diet

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Music of the locomotives

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Capacitors in the circuit

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Glasses or contact lenses

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Superluminal electron

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Ecocar

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Swinging barrel

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Capacitor duo

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Heureka

Problem Solution

Ecology above all

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Resistor blackbox

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Orbiters

Problem Solution

Mercujet

Problem Solution

Dimensionless hydrogen

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Jumping dog

Problem Solution

P5

Problem Solution

Weird gravity

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Gramme of hexagram

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Crystal mirror

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Running mirror

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Charged robber

Problem Solution

M.1: Drive safely!

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M.2: Wheelspokes

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M.3: Spleen on a bridge

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M.4: Broken altimeter

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E.1: A different one

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E.2: Firefly

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E.3: Shut it down!

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E.4: Anullator

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X.1: In the subway

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X.2: Crash

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X.3: Blip

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X.4: Cracking right now

Problem Solution