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THE PRACTICE STUDIO

Physics practice.
One idea at a time.

Choose a topic, try a problem, and work through the reasoning. Take a hint when you need one. Keep going when it clicks.

435 problems11 topic collections72 study chapters

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Practice collections

Browse all 435 problems ↓
39 problems

Measurement & tools

Read instruments, resolve vectors and check dimensions.

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36 problems

Motion & forces

Read motion, choose a frame and draw the forces.

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23 problems

Energy & momentum

Choose a system and follow what is conserved.

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34 problems

Rotation & gravity

Connect torque, rolling motion and orbits.

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39 problems

Fluids

Balance pressure, buoyancy and steady flow.

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25 problems

Oscillations & waves

Follow a cycle, compare phases and find patterns.

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56 problems

Thermal physics

Track heat, work and temperature changes.

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55 problems

Electricity & circuits

Build fields and simplify circuit connections.

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42 problems

Magnetism & induction

Work with moving charges and changing flux.

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47 problems

Optics

Trace rays and turn path differences into fringes.

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39 problems

Modern physics

Connect photons, matter waves and atomic energies.

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01

Build the foundations

Start with one principle and a clear model.

02

Connect the ideas

Choose the right method and carry it through.

03

Take on a challenge

Combine constraints, conservation laws and careful reasoning.

PRACTISE AT YOUR PACE

Explore all problems

36 problems · Showing 12

BeginnerFree sample01

Measurement & tools

Correct the whole reading

The zero correction applies to the combined reading; it does not change the pitch or least count.

Read graphs & measurements
Micrometer screw gauge
Start problem
Beginner02

Electricity & circuits

Calibrate what one division means

What is its figure of merit in μA per division?

Read graphs & measurements
Galvanometer half-deflection experiment
Start problem
BeginnerFree sample03

Modern physics

Leave voltage for the current limiter

An LED is not a resistor whose value is V_f/I at all currents; the declared forward-drop model has a limited operating range.

Apply a principle
LEDs, photodiodes and solar cells
Start problem
Beginner04

Modern physics

An alpha particle removes both proton and neutron counts

How many neutrons remain in the daughter nucleus?

Apply a principle
Alpha decayNuclear structure
Start problem
Beginner05

Modern physics

Beta decay changes identity without ejecting a nucleon

What is the proton number of the daughter nucleus?

Apply a principle
Beta decay
Start problem
Beginner06

Electricity & circuits

An electron transfer changes a signed integer count

What is its final charge?

Apply a principle
Charge quantization
Start problem
Beginner07

Electricity & circuits

A field arrow has a direction as well as a size

What is the signed y component of the electric field at P?

Connect concepts
Electric field lines
Start problem
Beginner08

Measurement & tools

Unpack a watt before converting area

What is the energy flux in SI units kg·s⁻³?

Apply a principle
SI units
Start problem
Beginner09

Measurement & tools

Estimate first, then choose a power of ten

What is the nearest power of ten to its estimated molecule count, using distance on a logarithmic scale?

Compare cases
Orders of magnitude
Start problem
Beginner10

Measurement & tools

Keep the sign while removing the magnitude

What is the x component of the unit vector in its direction?

Apply a principle
Unit vectorsVectors
Start problem
Beginner11

Energy & momentum

A conservative force closes its work ledger

What work does that same force do from C to A along any return route?

Apply a principle
Conservative forces
Start problem
Beginner12

Fluids

A hatch responds to pressure difference

What is the magnitude of the resultant pressure force?

Apply a principle
Pressure
Start problem

12 of 36 shown