As Shown in the Figure,a Person Standing on the Floor

Multiple Choice

As shown in the figure,a person standing on the floor pulls on a rope with a force F at an angle of (with respect to the positive x axis) in order to raise a weight of 30 N with pulleys.It is raised at a constant velocity.Consider the rope as massless and the pulleys as frictionless.(The mass hanging from the lower pulley does not interfere with the movement of the pulley.) What is the tension in the rope (within 5% accuracy) ?

A) 5 N
B) 10 N
C) 15 N
D) 21 N
E) 30 N