In a laboratory, scientists perform safety testing of a newly designed vehicle passenger compartment.
In one test, a crash dummy of mass 65 kg65 \text{ kg}65 kg travels at a constant velocity of 11 m/s11 \text{ m/s}11 m/s. Calculate the momentum of the dummy.
In another test, the momentum of the dummy changes by 850 kg m/s850 \text{ kg m/s}850 kg m/s during a collision lasting 0.14 s0.14 \text{ s}0.14 s. Calculate the average horizontal force acting on the dummy during this time.
State two factors that affect the braking distance of a vehicle on a road.
Use ideas about momentum to explain how an airbag in a car helps to reduce injuries to a passenger during a collision.
56 exam-style questions on Edexcel IGCSE Physics Forces, movement, shape and momentum. Each one has a worked solution and a mark scheme showing where the marks go.