Question

Page No:
1
Date:
04: A stone is dropped from a height of 20m
so that it is freely falling under granity.
Calcute the time in which the stone
waches the gucund and the velocity with
which the stone is going to strike the
ground:

Answer 1

Distance (s) =20 m

Initial velocity =0 m/s

g=10 m/s²

By using the formula:

v² =u² +2as

v² =0² +2×10×20

v² =400

v²= root 400

v=20m/s

For calculating time:

V=u+at

20=0+10×t

t=20/10

t=2 sec

The the stone will hit the ground with a velocity of 20 m/s in sec.