Question

A boy standing at the top of a tower of 20 metre height drops as soon as you mean G is equal to 10 M per second square velocity with which it hits the ground is

Answer 1

For a freely falling body

v = √(2gH)
= √(2 × 10 m/s² × 20 m)
= 20 m/s

Velocity when it hits the ground is 20 m/s