Homework Help: physics

Posted by michelle on Tuesday, November 23, 2010 at 11:39am.

Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angle of 27.1° above the horizontal. One child, with a mass of 42.4 kg, is hanging 1.22 m along the branch from the tree trunk. The other child, with a mass of 34.8 kg, is hanging 2.25 m from the tree trunk. What is the magnitude of the net torque exerted on the branch by the children? Assume that the axis is located where the branch joins the tree trunk and is perpendicular to the plane formed by the branch and the trunk.

physics - drwls, Tuesday, November 23, 2010 at 11:42am
Torque = cos 27.1*(M1*g*1.22m + M2*g*2.25m)

M1 = 42.4 kg and M2 = 34.8 kg
physics - michelle, Tuesday, November 23, 2010 at 12:07pm
I tried that it didnt get me the right answer.
I got -492.

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