A 16 kg rock m is on the edge of a 90 m cliff h as shown in


A 16 kg rock, m, is on the edge of a 90 m cliff, h, as shown in Figure 11-20. Assume that air resistance is negligible.

(a) What potential energy does the rock possess relative to the base of the cliff?

J

(b) The rock falls from the cliff. What is its kinetic energy just before it strikes the ground?

J

(c) What speed does the rock have as it strikes the ground?

m/s

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Physics: A 16 kg rock m is on the edge of a 90 m cliff h as shown in
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