Question

A tennis ball with mass 57 g is travelling at 45 m/s [S] when it is intercepted by a tennis racquet that applies an average force of 200 N during a short period of time, after which the ball travels at 62 m/s [N]. What is the time of contact between the ball and the racquet?

Answer 1

let t equal time of contact

change in velocity is ... 62 m/s + 45 m/s = 107 m/s

acceleration is ... (107 m/s) / t

f = m a ... 200 N = .057 kg * 107 m/s / t

200 t = .057 * 107