Question

A ball is thrown vertically downwards with velocity u from the top of a tower its it strikes the ground with velocity u the time taken by the ball to reach the ground is given by

Answer 1

Explanation:

We know v= u + at

Here v= final velocity. and u =initial velocity

so at= v- u

t= (v- u)/a

Here a= acceleration due to gravity = g= 9.8m.s^(-2)

t=( v- u )/g