Question

A tennis ball is thrown up and reaches a height of 4.05 before coming down.what was its initial velocity?(g=10m/S2​

Answer 1

Explanation:

s = 4.05m

v = 0m/s

g = 10m/s²

by using v²-u²=2gs

0²-u²= 2×10×-4.05

-u² = -81

u = 9

Therefore Initial velocity = 9m/s