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

(a) 10.0 m/s

(b) 20.0 m/s

(c) 40.0 m/s

(d) 5.0 m/s

Answer 1

Correct option (b) 20.0 m/s

Explanation:

Here, u = 0, g =10 ms^-2, h = 20 m

Let v be the velocity with which the stone hits the

ground.