An auto shop uses a mechanical lift to raise cars to work on them.

i. The lift raises a car to a height of 1.8 m using a force of 5500 N. How much work does the lift perform?

ii. The lift does 3000 J of work in 5 seconds. What is the power of the lift? iii. If the lift has a maximum power of 5000 W, how much time would it take the lift to perform 35,000 J of work?

iv. The lift raises a car of mass 850 kg to a height of 2.1 m. It uses a force of 8330 N and takes 4 seconds to raise the car. What is the power of the lift?