which two objects have stored energy A)a ball rolling on the ground B) a small rock sitting on top of a big rock C)a stretched r

Question

Anna007 [38]

3 years ago

14

which two objects have stored energy A)a ball rolling on the ground B) a small rock sitting on top of a big rock C)a stretched r

ubber band D) a stone lying on the ground

Physics

2 answers:

Alik [6] · Answer 1 · 2022-09-20T15:53:34+03:00

Alik [6]3 years ago

5 0

B). <span>a small rock sitting on top of a big rock has a little bit of
stored gravitational potential energy

C). a stretched rubber band has some stored elastic energy</span>

Semenov [28] · Answer 2 · 2022-09-20T17:40:56+03:00

Answer:

B) a small rock sitting on top of a big rock C)a stretched rubber band

Explanation: Stored energy is also known as potential energy. This is defined as the energy possessed by an object that is stationary, i.e an object that is not in motion.

A stretched rubber band has elastic potential energy.

A small rock sitting on top of a big rock has gravitational potential energy because it is stationary and it is located at a certain height above the earth's surface.

However, taking the earth's surface as a reference, the stone lying directly on the earth's surface does not have any potential energy even though it is stationary; reason being that it is at a zero height from the earth's surface. This claim can be justified from the simple formula E=mgh which is used to calculate gravitational potential energy. When height h = 0, then consequently the equation reduces to zero, i.e. potential energy E = 0