A tennis ball has a mass of 0.057kg. A professional tennis player hits the ball hard enough to give it a speed of 50m/s (about 120mph). The ball hits a wall and bounces back with almost the same speed(50m/s). The ball is crushed 2cm(0.02m) at the instant when its speed is momentarily zero, before rebouding. Making the very rough apporximation that the large force that the wall exerts on the ball is approximately constant during contact, determine the approximate magnitude of this force.
Hint : Thinkabout the approximate amount of time it takes for the ball to comemomentarily to rest.