prob_012 - 12. REASONING The acceleration of the sky diver...

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12. REASONING The acceleration of the sky diver can be obtained directly from Newton’s second law as the net force divided by the sky diver’s mass. The net force is the vector sum of the sky diver’s weight and the drag force. SOLUTION From Newton’s second law, Fm a Σ= (Equation 4.1), the sky diver’s acceleration is F a m Σ = The free-body diagram shows the two forces acting on the sky diver, his weight
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