A ball of mass m m\,m travels horizontally to the right with speed uuu. After colliding with a vertical wall, it rebounds horizontally to the left with speed vvv. What is the magnitude of the change in momentum of the ball?
m(u−v)m(u - v)m(u−v)
m(u+v)m(u + v)m(u+v)
mumumu
mvmvmv
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.