Question

Suppose the tractor pulls horizontally on the sled instead of at an angle of 36.9. As a result, the magnitude of the friction
72 Work 187 SOLUTION The statement of the problem gives the hright h rather than the distance s measured along the ramp, but


of situation b) Free-body diagram of package EXAMPLE 7.3 Work done by several forces Now lets consider the total work done o
wra SOLUTION From Figure 7.14b ener SET UP Figure 7.14b shows a free-body diagram and a coordinate sys tem, identifying all t
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Accovdling to the uetian 4400p-Tk Total wurk cone w Here d18 CfeS) =00 (F8S) on the sted w FrS CosFScosd =F-S Cos Co + fe Cos

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