A baby elephant is stuck in a mud hole. To help pull it out, game keepers use a

Question

A baby elephant is stuck in a mud hole. To help pull it out, game keepers use a rope to apply force A, as part (a) of the drawing shows. By itself, however, force A is insufficient. Therefore, two additional forces B and C are applied, as in part (b) of the drawing. Each of these additional forces has the same magnitude F and is oriented at ? = 19.5° away from A. The magnitude of the resultant force acting on the elephant in part (b) of the drawing is eleven times that in part a. Find the ratio F / FA.

Explanation / Answer

so, you can set an equation as : 2Fcos 19.5 degree + Fa = 2Fa F/Fa = 1/(2cos19.5 degree) ˜0.53

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