A hammer falls off the top roof and strikes the ground with a certain kinetic energy. If it fell from a roof twice as tall how would the kinetic energy compare?

Question

Physics

Kristian Costa

12 October, 18:41

A hammer falls off the top roof and strikes the ground with a certain kinetic energy. If it fell from a roof twice as tall how would the kinetic energy compare?

+2

Answers (2)

Know the Answer?

Yadiel Cummings · Answer 1

No it would not compare because if you dropped off a higher building the kinetic energy would be higher than it was before.

Giuliana Keith · Answer 2

The kinetic energy with which the hammer strikes the ground

is exactly the potential energy it had at the height from which it fell.

Potential energy is (mass) x (gravity) x (height) ... directly proportional

to height.

Starting from double the height, it starts with double the potential

energy, and it reaches the bottom with double the kinetic energy.