Question

A ball is dropped from a height of 23.5 meters. Assuming no air resistance, how many seconds will it take the ball to hit the

ground?

Answer 1

It will attain a speed of 20m/s before touching the ground, but the time taken to reach the ground is 2 seconds. Because the velocity is not uniform but acceleration/gravity is. Therefore, the answer to your question is: 2 seconds.

Answer 2

About 2.19 seconds

Step-by-step explanation:

`d=v_ot+(1)/(2)at^2`

Since the ball is dropped from rest, there is no initial velocity, and you can write the following equation:

`23.5=(1)/(2)(9.8)t^2 \\\\t^2\approx 4.79 \\\\t\approx 2.19s`

Hope this helps!