A piano mover raises a 1000-N piano at a constant speed using a very light rope in a frictionless pulley system,as shown in the figure.With what force is the mover pulling down on the rope?
A)2000 N
B)1000 N
C)500 N
D)250 N
E)Depends on the speed of the piano.

Question

A piano mover raises a 1000-N piano at a constant speed using a very light rope in a frictionless pulley system,as shown in the figure.With what force is the mover pulling down on the rope? 
A)2000 N 
B)1000 N 
C)500 N 
D)250 N 
E)Depends on the speed of the piano.

Quizplus · Accepted Answer

The Answer of A piano mover raises a 1000-N piano at a constant speed using a very light rope in a frictionless pulley system,as shown in the figure.With what force is the mover pulling down on the rope? 
A)2000 N 
B)1000 N 
C)500 N 
D)250 N 
E)Depends on the speed of the piano.

A Piano Mover Raises a 1000-N Piano at a Constant