Question

A phone dropped at a height of 3600 ft. How many seconds will it take for the phone to hit the ground

Answer 1

the time of fall of the stone is 15 s.

Explanation:

Given;

height through which the stone was dropped, h = 3,600 ft

the initial velocity of the stone, u = 0

The time of fall of the stone is calculated using the following kinematic equation;

h = ut + ¹/₂gt²

h = 0 + ¹/₂gt²

h = ¹/₂gt²

where;

g is acceleration due to gravity = 32.17 ft/s²

`t = \sqrt{(2h)/(g) } \\\\t = \sqrt{(2* 3,600 \ ft)/(32.17 \ ft/s^2) }\\\\t =14.96 \ s = 15 \ s`

Therefore, the time of fall of the stone is 15 s.