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A rock of mass 77.8 kg breaks loose from the edge of a clitf and falls straight down. The magnitude of the air resistance that

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A rock of mass 77.8 kg breaks loose from the edge of a clitf and falls straight down. The magnitude of the air resistance that opposes its downward motion is 210 N. What is the magnitude of the acceleration of the rock? Communication satellites are placed in a circular orbit that is 3.23 x 105 m above the surface of the earth. What is the magnitude of the acceleration due to gravity at this distance

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