Question

The average velocity of a tennis ball is measured during serving and found to be 216 km/hr.

Calculate the time elapsed between hitting the ball and meeting the ground if the distance covered by the ball during that interval is 20m​
PLEASE ANSWER WITH EXPLANATION :)

Answer 1

The time between hitting the ball and meeting the ground is
`t=0.33\: s`

Step-by-step explanation:

We have a semi parabolic motion here. We know that the initial speed 216 km/h or 60 m/s in the x-direction.

So we can use the following equation:

`v=(\Delta x)/(\Delta t)`

`60=(20)/(t)`

`t=(20)/(60)`

`t=0.33\: s`

hope it helps you!