Use the Figure to Answer the Question

question 41

Multiple Choice

Use the figure to answer the question. A light rope runs through two frictionless pulleys of negligible mass.A mass,m,is hung from one of the pulleys and a force,F is applied to one end of the rope so that the mass moves at a constant speed.
-What is the force needed to move the mass at a constant speed?

• A)0
• B) mg
• C)mg
• D)2mg
• E)4mg