Fig. 2.1 presents a tennis ball moving towards a tennis racket.
The tennis ball strikes the racket at a speed of 52 m/s. The mean force on the ball while it is in contact with the racket is 350 N. After leaving the racket, the ball travels at 26 m/s in the direction opposite to its original motion. The mass of the ball is 58 g.
(a(i))[3]
Calculate the change in momentum of the ball during the period it is touching the racket.
(a(ii))[1]
State an equation that gives impulse using force and time.
(a(iii))[2]
Calculate the duration for which the racket is in contact with the ball.
(b)[3]
Calculate how much the kinetic energy of the ball differs before and after impact with the racket.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Answer: 4.5 kg m/s” …