Two children hang by their hands from the same tree branch. Thebranch is straigh

Question

Two children hang by their hands from the same tree branch. Thebranch is straight, and grows out from the tree at an angle of34° above the horizontal. One child, with a mass of 32 kg, is1.7 m along the branch from the tree trunk. The other child, with amass of 53 kg, is 2.1 m along the branch from the tree trunk.What is the magnitude of the net torque exerted on the branchby the children? Assume that the axis is located where thebranch joins the tree trunk and is perpendicular to the planeformed by the branch and the trunk.

Explanation / Answer

use cos instead of sin

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