Question

1. A crane lifts a weight of 3500 N through a vertical height of 0.2 km
a. What is the work done by the crane?
b. What is the GPE of the weight at the top of 0.2 km, assuming there in no loss of energy?

Answer 1

Answer:

NOTE: The next 15 questions presume that the value of g is 10 m/s/s.

11. A 1200 kg car and a 2400 kg car are lifted to the same height at a constant speed in a auto service station. Lifting the more massive car requires ____ work.

a. less

b. the same

c. twice as much

d. four times as much

e. more than 4 times as much

Answer: C