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A girl is standing at the edge of a cliff 111 m above the

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A girl is standing at the edge of a cliff 111 m above t\he ground. She reaches out over the edge of the cliff and throws a rock straight upward with a speed of 8.79 m/s.

a) How long does it take the rock to hit the ground?

b) What is the speed of the rock the instant before it hits the ground?

Reference no: EM13629401

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