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## Will Mark Brainliest PLZ!!!!!!!!!! If an apple has 18 Joules of potential energy when it is dropped, how much kinetic energy will it have wh

Question

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## Answers ( )

Answer: 6 Joules

Explanation:

You are given that the potential energy P.E of the apple = 18 Joules

PE = mgh

Where g = 9.8 m/s^2

18 = mgh

Initially, The mechanical energy of the apple = 18 Joule.

According to conservative of energy

the total energy of the apple will be 18 Joules. That is,

K.E + P.E = 18 Joules

when the apple has fallen to one third its original height, the remaining height from the ground upward will be:

height h = 1 – 1/3 = 2/3

The new Potential energy will be

P.E = 2/3 × 18

P.E = 12 Joules

The potential energy lost must have been converted to the kinetic energy according to conservative of energy

K.E + 12 = 18

Make K.E the subject of formula

K.E = 18 – 12 = 6 Joules

Therefore, the apple will have 6 Joules of kinetic energy when it has fallen to one third its original height.