Question

A boy standing at the top of a tower of 20 m height drops a stone. Assuming g = 10 m s^-2, the velocity with which it hits the ground is

Answer 1

H=20m

g=10m/s^2

u=0

v^2-u^2 = 2gh

v^2-0=2*10*20

v = 20 m/s^2