A ball of mass 0.080 kg hits a wall at a speed of 32 m s–1 and rebounds at a speed of 22 m s–1.
(a) Calculate the change in momentum of the ball. [2]
(b) If the impact between the ball and the wall lasts for 0.15 s, calculate the average force on the ball. [3]
(c) Explain whether momentum is conserved in this interaction. [2]
