Two Equal Masses Are Raised at Constant Velocity by Ropes

question 29

Multiple Choice

Two equal masses are raised at constant velocity by ropes that run over pulleys,as shown below.Mass B is raised twice as fast as mass A.The magnitudes of the forces are F_A and F_B,while the power supplied is respectively P_A and P_B.Which statement is correct?

• A)F_B = F_A;P_B = P_A.
• B)F_B = F_A;P_B = 2 P_A.
• C)F_B = 2 F_A;P_B = P_A.
• D)F_B = 2 F_A;P_B = 2 P_A.
• E)P_A = F_A;P_B = F_B.

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