Dana Uses a Rope to Pull a Box That Weighs

Multiple Choice

Dana uses a rope to pull a box that weighs 600 N across a level surface with constant velocity.The rope makes an angle of 40° above the horizontal and the tension in the rope is 400 N.What is the coefficient of friction?

A) 0.89
B) 0.88
C) 2.00
D) 1.19
E) ​0.84