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

Answer:

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

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:

$v=\frac{\Delta x}{\Delta t}$

$60=\frac{20}{t}$

$t=\frac{20}{60}$

$t=0.33\: s$

hope it helps you!