Question

A body is allowed to fall freely from a height of 2000 m. Find the
time taken to reach the ground. (g = 10 ms-2).​

Answer 1

Answer:

Explanation:

Given,

Height ( S ) = 2000 m

Acceleration ( g )= 10m/s²

Initial velocity ( u ) = 0 [ as the body is in rest ]

Let the time taken be t seconds ,

From equations of motion,

S = ut + (1/2)gt²

2000 = (1/2)*10*t²

2000 = 5*t²

400 = t²

√400 = t

20 = t

Hence, the ball will take 20 seconds to fall and hit the ground.