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vovangra [49]
3 years ago
7

Identify what happens to the kinetic energy (KE) and gravitational potential energy (PE) of a rock as it falls.

Physics
1 answer:
Oksi-84 [34.3K]3 years ago
3 0

Answer:

KE increases and PE decreases.

Explanation:

<u>POTENTIAL ENERGY (PE)</u>:

The potential energy of the rock depends upon the height of the rock, as given by the following formula:

P.E = mgh

Therefore, the potential energy will be highest at the initial point due to the highest height attained by rock. As the rock falls, its height will decrease as a result its <u>potential energy will also decrease</u>.

<u>KINETIC ENERGY (KE)</u>:

The kinetic energy of the rock depends upon the velocity of the rock, as given by the following formula:

K.E = \frac{1}{2}mv^2

Therefore, the kinetic energy will be zero at the initial point due to the zero velocity of the rock. As the rock falls, its velocity will increase as a result its <u>kinetic energy will also increase</u>.

Hence, the correct option will be:

<u>KE increases and PE decreases.</u>

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