Question

A stone is dropped from a cliff what will be it's speed when it has fallen 100m​

Answer 1

Answer:

44.27m/s

Explanation:

The stone is dropped from the cliff. So,

Initial Speed = u=0

Distance = s=100m

Final Speed = v

Acceleration = a = g = 9.8

sec

2

m

Now,

v

2

=u

2

+2as

v

2

=0+2∗9.8∗100

v=

(

2∗9.8∗100)

v=44.7

sec

m