PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
During a football match, a player kicks a 0.15kg ball. Just before the kick, the ball is moving eastward at 10ms−1. Immediately after the kick, the ball moves westward at 25ms−1. The player’s foot is in contact with the ball for 0.020s.
(i) Calculate the change in momentum of the ball produced by the kick. State its magnitude and direction.
(ii) Determine the average force exerted by the player on the ball during the contact time. Give the magnitude and direction of this force.