Question

A body freely falling from rest has velocity v after it falls through a height h. The distance it has to fall down
further for its velocity to become double is
(1) 4h (2)3h
(2) 6h
(4) 10h​

Answer 1

Answer:

3h

Explanation:

Let h be the initial height. h' be the final height. Then

(2v) ² = 2gh'

(4v) ² = 2gh'

4(2gh) = 2gh'

h' = 4h.

But h' is total distance. Thus extra distance it has to move = 4h-h= 3h.

Answer 2

Answer:

3h

Explanation: