A tennis ball has a mass of0.057kg. A professional tennis player hits the ball hard enough to give it a speed of52m/s (about117miles per hour.) The ball moves toward the left, hits a wall and bounces straight back to the right with almost the same speed (52m/s). As indicated in the diagram below, high-speed photography shows that the ball is crushed aboutd=2.5cm at the instant when its speed is momentarily zero, before rebounding. Making the very rough approximation that the large force that the wall exerts on the ball is approximately constant during contact, determine the approximate magnitude of this force.

What is the magnitude of the average force exerted by the wall on the ball during contact? |V_avg| = _ N In contrast, what is the magnitude of the gravitational force of the Earth on the ball? mg= _N