Dana Uses a Rope to Pull a Box That Weighs

Multiple Choice

Dana uses a rope to pull a box that weighs 300 N across a level surface with constant velocity.The rope makes an angle of 30° above the horizontal and the tension in the rope is 50 N.What is the coefficient of friction?

A) 0.35
B) 0.29
C) 0.16
D) 0.20