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20 QUESTIONS · 5 TOPICS · COLLISION LAB · ABOUT 15 MINUTES

Three laws and one equation took us to the Moon.

NASA still plots spacecraft paths with Newton's mechanics from 1687. Twenty questions on motion, momentum, rotation and orbits, each explained, then crash two carts and see what survives the collision. No sign-up, nothing saved.

Start the test
1InertiaObjects keep doing what they're doing unless a net force acts.
2F = maNet force equals mass times acceleration.
3Action–reactionEvery force has an equal and opposite partner.
QUESTION 1 / 20 · KINEMATICSMedium

A car accelerates uniformly from rest to 20 m/s in 5 s. How far does it travel?

COLLISION LAB

Crash two carts. What's conserved?

Momentum is always conserved in a collision. Kinetic energy is only conserved when the bounce is perfectly elastic. Set the masses, speeds and bounciness, then compare before and after.

BEFORE
→ 4.0 m/s2 kg
← 2.0 m/s1 kg
AFTER
→ 0.8 m/s2 kg
→ 4.4 m/s1 kg
Momentum (kg·m/s)CONSERVED
Before6.00After6.00
Kinetic energy (J)LOST 43%
Before18.00After10.32
Momentum is conserved exactly. 43% of the kinetic energy is lost to heat, sound and deformation.

What this classical mechanics test covers, in short

Twenty multiple-choice questions at first-year university level, four on each of five topics: kinematics, Newton's laws, work and energy, momentum, and rotation and gravitation. It goes a step beyond the general physics test.

Use g = 9.8 m/s² and ignore air resistance unless stated. New to physics? Start with the general physics test. The test is our own and not normed.

By What's Your IQ · Reviewed 5 Oct 2026
Format
20 multiple-choice questions
Level
First-year university
Bonus
1D collision lab with momentum and energy
Founding text
Newton, Principia (1687)

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