A ball is held at rest and then dropped. The final velocity of the ball was 45 m/s just before it hit the ground. How high was the ball when it was dropped?How much time past before the ball hit the ground?

a) y = 103.21 m

b) t = 4.6 s

Explanation:

a) The height at which the balls was is given by:

Where:

: is the final height = 0

: is the initial height =?

: is the final velocity = 45 m/s

: is the initial velocity = 0 (is held at rest

g: is the gravity = 9.81 m/s²          

Hence, the height is:

b) The time before the ball hit the ground is:

Therefore, 4.6 seconds passed before the ball hit the ground.

I hope it helps you!  

i just did an experiment like this in my science class. also the answer is yes, it will get separated because they are two opposites meaning if they are opposite they can not attract.

hope this .!