A ball falls vertically to the floor and rebounds vertically upwards.
Just before it hits the floor, its speed is 6.0 m s-1.
As it rebounds, its speed is 4.0 m s-1.
The mass of the ball is 0.25 kg.
What is the change in momentum of the ball?
0.50 kg m s−10.50\text{ kg m s}^{-1}0.50 kg m s−1 downwards
0.50 kg m s−10.50\text{ kg m s}^{-1}0.50 kg m s−1 upwards
2.5 kg m s−12.5\text{ kg m s}^{-1}2.5 kg m s−1 downwards
2.5 kg m s−12.5\text{ kg m s}^{-1}2.5 kg m s−1 upwards
78 exam-style questions on CIE IGCSE Physics Momentum, covering Momentum. Each one has a worked solution and a mark scheme showing where the marks go.