College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

تمرين 32

In preparation for its tire rotation, a car weighing 2.25 tons is placed on a hydraulic garage lift. The mechanic then raises the car 30.0 cm. (a) Calculate the work done on the car when it is lifted. (b) Assuming no frictional losses in the hydraulic fluid, how much work was done by the lift on the input side (c) What was the force on the input side if its piston moved 52.5 cm (d) Determine the ratio of the input side area to that of the lifting side (output) area