Question

A boy standing at the top of a tower of 20m height drops a stone . Assuming g=10ms-2 the velocities with which it hits the ground is please tell crt answer​

Answer 1

Answer:

When there is a free fall, we can directly use the equation of motion :

v

2

=u

2

+2gh

here u=0

so, v=

2gh

=

2×10×20

=20 m/s

Answer 2

Answer:

20 ms^-1

Explanation:

v2=u2+2gh

= 2gh [u=0]

=2*10*20

=400

v=20