CBSE
Gujarat Board
Haryana Board
Class 10
Class 12
A boy standing at the t op of a tower of 20 m height drops a stone. Assuming g = 10 ms^{-2}, the velocity with which it hits the ground is
20 m/s
40 m/s
5 m/s
10 m/s
A.
20 m/s
Given, g = 10 ms^{-2} and h = 20 m
We have
Given, g = 10 ms^{-2} and h = 20 m
We have