Question

When serving a tennis ball, a player hits the ball when its velocity is zero (at the highest point of a vertical toss). The racquet exerts a force of 540 N on the ball for 5.00 ms, giving it a final velocity of 45.0 m/s. Using these data, find the mass of the ball

Answer 1

Answer:60 gm

Step-by-step explanation:

Given

initial velocity of ball
`u=0`

Force exerted by racquet
`F=540 N`

time period of force
`t=5\ ms`

final velocity of ball
`v=45\ m/s`

Racquet imparts an impulse to the ball which is given by

`J=F\Delta t=\Delta P`

`J=540* \Delta t=m(45-0)`

`m=(540* 5* 10^(-3))/(45)`

`m=60\ gm`