A crane is lowering two boxes downward at a constant velocity. The cable from the crane is attached directly to the upper box, m1, which has a mass of 95kg and a second cable hanging from the upper box supports the lower box, m2, which has a mass of 140kg.

Question

A crane is lowering two boxes downward at a constant velocity. The cable from the crane is attached directly to the upper box, m1, which has a mass of 95kg and a second cable hanging from the upper box supports the lower box, m2, which has a mass of 140kg.
Determine the tension in the lower cable.
Determine the tension in the upper cable in the above diagram.

bobpursley · Answer

tension=m2*g in lower upeer= (m2+m1)g in upper cable