youssefelrai youssefelrai

14-05-2023
Physics

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8-A 5.45 kg rock falls from a cliff that is 23.5 m above the ground to a cliff that is 12.3 m above the ground.
a. Find the kinetic energy of the rock when it reaches the lower cliff. Assume air does no work on the rock.
b. What is the rock's speed when it reaches the lower cliff?

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