Question

Q.10- A body reaches ground in time T when dropped from height h, what is the time taken by the body
if it is dropped from height 2h?
(a) 2 T
(b) (V2 - 1)T
(c) V2T
(c) T/v2​

Answer 1

Explanation:

takes time “T” to reach the ground then,

H = 0.5gT²

T = √(2H/g)

If it takes time “t” to travel first half of the journey then,

0.5H = 0.5gt²

H = gt²

t = √(H/g)

Time taken to cover second half of the journey is = T - t

= √(2H/g) - √(H/g)

= √(H/g)×(√(2) - 1)