Meriam, Kraige & Bolton — Kinetics of Particles: Problem 3_169

3/169 A tennis player strikes the tennis ball with her racket while the ball is still rising. The ball speed before impact with the racket is \( v_1 = 15 \text{ m/s} \) and after impact its speed is \( v_2 = 22 \text{ m/s} \), with directions as shown in the figure. If the 60-g ball is in contact with the racket for 0.05 s, determine the magnitude of the average force \( \mathbf{R} \) exerted by the racket on the ball. Find the angle \( \beta \) made by \( \mathbf{R} \) with the horizontal. Comment on the treatment of the ball weight during impact.