On Mars, a ball is rolling from a ground to a hill, and we know the height of the hill, Z, is 10 m, and the initial velocity of the ball on the ground and the final velocity on the hill are known: V1 = 20 m/s and V2 = 10 m/s, respectively. The mass of the ball, m, is 4 kg. The gravitational acceleration on Mars, gMars, is 3.7 m/s2 . Please calculate 1) the change in kinetic energy, ΔKE, in J and 2) the change in potential energy, ΔPE, in J, of the ball for the rolling process.

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