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

question 79

Multiple Choice

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.

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