Figure E-3 -To Lift the 5000-N Block, the Man Finds That He

Multiple Choice

Figure E-3

-To lift the 5000-N block, the man finds that he must pull 10 m of rope through his hands for every 1 m the block rises. Neglecting the weights of the pulleys and friction, how hard must the man pull on the rope to raise the block?

A) 5 N
B) 50 N
C) 500 N
D) 5000 N
Which is in accord with
E) Newton's second law.
F) that impulse equals change in momentum.
G) (F × d) input = (F × d) output.
H) mechanical energy can be stored as potential energy.