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13 March, 04:46

A ball is falling after rolling off a tall roof. The ball has

a. kinetic energy only.

b. potential energy only.

c. both kinetic and potential energy.

d. neither kinetic or potential energy.

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Answers (2)
  1. 13 March, 05:09
    0
    C.

    Because it's falling it has acceleration in the y direction. If you have acceleration, you usually also have velocity, and since kinetic energy is KE = Mv^2 you know you have it. It also has potential energy because it has some height to it, and PE = Mgh.
  2. 13 March, 05:15
    0
    The ball has both kinetic and potential energy.
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