Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angl
e of 27.0° above the horizontal. One child, with a mass of 44.0 kg, is hanging 1.00 m along the branch from the tree trunk. The other child, with a mass of 27.0 kg, is hanging 2.10 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.
A machine in which work input equals work output. energy can be used to do work, work can be used to transfer energy. The change in the kinetic energy of an object is equal to the net work done on the object.