Author Question: A 2-kg ball is held 4 m above the ground. Relative to the ground its potential energy is A) 6 J. ... (Read 85 times)

skymedlock · **on:** Jul 29, 2018

A 2-kg ball is held 4 m above the ground. Relative to the ground its potential energy is

A) 6 J.
B) 8 J.
C) 32 J.
D) 80 J.
E) more than 80 J.

Question 2

A clerk can lift cylindrical packages 1 meter vertically, or can roll them up a 2-meter-long ramp to the same elevation. With the ramp, the applied force required is about

A) half as much.
B) the same.
C) twice as much.
D) four times as much.