Determine the limiting effciency for a simple machine with the law E =0.25F+0.6 kN and a VR of 5. A differential wheel and axle has a wheel of diameter 480 mm and axles of diameters 80 mm and 120 mm....

Determine the limiting effciency for a simple machine with the law E =0.25F+0.6 kN and a VR of 5.

A differential wheel and axle has a wheel of diameter 480 mm and axles of diameters 80 mm and 120 mm. What is the effciency if it takes an effort of 144 N to raise a load of 2240 N?