Momentum GCSE questions
Cover the answers and try these Momentum checks first. The full quiz in the app includes hints.
How to use these
Write your answer, then check. If you miss one, open the Momentum lesson before you retry.
Practice questions
Cover the answers and have a go first. Worked solutions are underneath.
Momentum p =
The unit of momentum is
In a closed system, collisions conserve
A 4 kg object at 5 m/s has momentum
Common mistakes
- Do not use km/h in p = mv without converting to m/s. Momentum is not a force.
- Do not "conserve" speed or KE by default. Do not forget the stationary object still has mass in the after line if they stick.
- Stopping does not mean Δp = 0. Δp is the change: after minus before. Using speed without reversing a bounce undercounts Δp.
- Do not say the air bag "reduces momentum to zero so there is no force". There is still a force; it is smaller because time is larger.
Answers and working
Frequently asked questions
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