The two trees in Fig. 9-58 are 7.6m apart. A back packer is trying to lift his

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The two trees in Fig. 9-58 are 7.6m apart. A back packer is trying to lift his pack out of the reach of bears. Calculate the magnitude of the force F that he must exert downward to hold a 19-kg backpack so that the rope sags at its midpoint by
(a) 1.5 m,
(b) 0.15m.


The two trees in Fig. 9-58 are 7.6m apart. A
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