Question

For a freely falling body from a height ‘H’, the time taken to reach ground is ___

Answer 1

t =√2H/√9.8

Explanation:

We know, displacement is 's' . So,

s = ut + 1/2at²

Here,

Initial velocity,u = 0 ,. height,s = H,. acceleration due to gravity,a = g(9.8m/s)

So,

• H = 0t + 1/2gt²
• H = 1/2gt²
• t² = 2H/9.8
• t = √2H/√9.8

Hope it helps