Answer: 63 miles per hour
i think
Explanation:
Depending on the height of the building they can break due to impact on the floor.
Answer: approximately 50%
Explanation:
Thank you for posting your question here at brainly. Below is the solution:
Ke up top = 1/2*.25 *225
<span>gain of Pot energy = .25*9.81*1.2 </span>
<span>work input = (1/4)(2 pi *.6)*30 </span>
<span>so </span>
<span>sum of those 3 energies = </span>
<span>(1/2)(.25)v^2</span>
