Question

A child throws a ball in upward direction and then catches it after 8 seconds The determine the velocity with the ball was thrown up?​

Answer 1

Answer:

velocity with which ball was thrown up is 39.2 m/s or 40 m/s.

Explanation:

On applying third equation of motion;

$s = u \times t + \frac{1}{2} a \times {t}^{2}$

s=0

t= 8 seconds

a= -g = -9.8 or -10 m/s2

on solving;

u = 39.2 or 40 m/s