A mover's dolly is used to deliver a refrigerator up a ramp into a house. The refrigerator has a mass of 106 kg . The ramp is 1.6 m long and rises 0.192 m. The mover pulls the dolly with constant velocity and with a steady force of 497 N up the ramp. The dolly and ramp constitute a machine. The acceleration of gravity is 9.8 m/s2 . What work does the mover do?