A factory worker pushes a 30.0 kg crate a distance of 4.5 m along a level floor at constant velocity by pushing downward at an angle of 30° below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.25.

Part A

What magnitude of force must the worker apply to move the crate at constant velocity?

Part B

How much work is done on the crate by this force when the crate is pushed a distance of 4.5 m?

Part C

How much work is done on the crate by friction during this displacement?

Part D

How much work is done by the normal force?

Part E

How much work is done by gravity?

Part F

What is the total work done on the crate?