ch05-p086 - 86. We take the down to be the +y direction....

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86. We take the down to be the + y direction. (a) The first diagram (shown below left) is the free-body diagram for the person and parachute, considered as a single object with a mass of 80 kg + 5.0 kg = 85 kg. G F a is the force of the air on the parachute and mg G is the force of gravity. Application of Newton’s second law produces mg F a = ma , where a is the acceleration. Solving for F a we find () 22 85 kg 9.8 m/s 2.5 m/s
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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