Question

An object is dropped from a height of 50 meters. Ignoring air resistance, how long doe take to hit the ground?

Answer 1

here given that object is dropped from height h = 50 m

So here we can say

initial speed is ZERO

acceleration is due to gravity

now in order to find time to reach the ground we can use kinematics

`y = v_i*t + (1)/(2)at^2`

now plug in all values in it

`50 = 0 + (1)/(2) * 9.8(t^2)`

`t = 3.2 s`

so it will take 3.2 s to reach the ground