Apply what you know about torques by making a mobile. Shown below are five horizontal arms with fixed 1- and 2-kg masses attached, and four hangers with ends that fit in the loops of the arms, lettered A through R. You are to figure where the loops should be attached so that when the whole system is suspended from the spring scale at the top, it will hang as a proper mobile, with its arms suspended horizontally. This is best done by working from the bottom upward. Choose the loops where the hangers should be attached. You may assume the horizontal struts and connecting hooks are practically massless compared to the 1- and 2-kg masses.

 

 

Present your solution on a separate sheet of paper by making a sketch of your completed mobile.

 

You would connect point ____ DEFG to point ____. ABC

You would connect point ____ HIKK to point ____. DEFG

You would connect point ____ LMNO to point ____. HIKK

You would connect point ____ PQR to point ____. LMNO

The spring scale should be connected to point ____. PQR