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18-04-2024
Physics

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A bicyclist starts with a speed of 1.40 m/s at the top of a hill and without pedaling or braking he attains a speed of 12.1 m/s when he reaches the bottom of the valley. Determine the difference in height between the top of the hill and the bottom of the valley. Assume that friction and air resistance are absent, and the wheels of the bicycle has negligible mass. Select one: 7.4 m 1.21 m 14.8 m 10.7 m 12.0 m

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