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

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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 when it has fallen to one third its original height?

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5 months 2021-08-18T08:12:08+00:00 1 Answers 9 views 0

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    2021-08-18T08:13:41+00:00

    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.

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