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

$y = v_i*t + \frac{1}{2}at^2$

now plug in all values in it

$50 = 0 + \frac{1}{2} \times 9.8(t^2)$

$t = 3.2 s$

so it will take 3.2 s to reach the ground