A rope is tied to a box and used to pull the box 1.7 m along a horizontal floor. The rope makes an angle of 30∘ with the horizontal and has a tension of 5 N. The opposing friction force between the box and the floor is 1 N.

Question

Part A
How much work does gravity do on the box?
Part B
How much work does the tension in the rope do on the box?
Part C
How much work does the friction do on the box?
Part D
How much work does the normal force do on the box?
Part E
What is the total work done on the box?

Answer 1

A) Gravity is NOT in the direction of motion, so ZERO

B) 5 cos 30 * 1.7

C) -1 * 1.7

D) Same answer as A

E) B-C