A tennis ball is momentarily at rest when a player hits it with a racket. The racket is in contact with the ball for a time of 0.025 s.
The average force exerted on the ball during this contact is 180 N. The ball leaves the racket with a speed of 30 m/s.
Which of the following gives the impulse of the racket on the ball and the average acceleration of the ball during the contact time of 0.025 s?
Impulse =4.5 N s= 4.5\text{ N s}=4.5 N s, average acceleration =0.75 m/s2= 0.75\text{ m/s}^2=0.75 m/s2
Impulse =4.5 N s= 4.5\text{ N s}=4.5 N s, average acceleration =1200 m/s2= 1200\text{ m/s}^2=1200 m/s2
Impulse =7200 N s= 7200\text{ N s}=7200 N s, average acceleration =0.75 m/s2= 0.75\text{ m/s}^2=0.75 m/s2
Impulse =7200 N s= 7200\text{ N s}=7200 N s, average acceleration =1200 m/s2= 1200\text{ m/s}^2=1200 m/s2
78 exam-style questions on CIE IGCSE Physics Momentum, covering Momentum. Each one has a worked solution and a mark scheme showing where the marks go.