Author Question: A clerk can lift containers a vertical distance of 1 m, or roll them up a 2-m-long ramp to the same ... (Read 38 times)

Charlie · **on:** Jul 29, 2018

A clerk can lift containers a vertical distance of 1 m, or roll them up a 2-m-long ramp to the same elevation. With the ramp, the applied force needed is

A) half as much.
B) twice as much.
C) the same.

Question 2

A 35-N bucket of water is lifted vertically 3.0 m and then returned to its original position. How much work did the gravitational force exerted by Earth on the object do on the bucket during this process?

A) 180 J
B) 90 J
C) 45 J
D) 0 J
E) 900 J