A mover's dolly is used to transport a refrigerator up a ramp into a house. The refrigerator has a mass of 108 kg. The ramp is 2.10 m long and rises 0.850 m. The mover pulls the dolly with a force of 508 N up the ramp. The dolly and ramp constitute a machine.
(a) What work does the mover do?
(b) What is the work done on the refrigerator by the machine?
(c) What is the efficiency of the machine?
Work done by the mover = Applied force * distance that he pulls the refrigerator-dolly ...
The expert examines how mover's use a dolly to transport a refrigerator up a ramp.