A 120 kg crate is dragged along the horizontal ground by a 200 N force acting at

Question:

A 120 kg crate is dragged along the horizontal ground by a 200 N force acting at an angle of 30° to the horizontal, as shown.

The crate moves along the surface with a constant velocity of 0.5 m s⁻¹. The 200 N force is applied for a time of 16 s.
a. Calculate the work done on the crate by:
i. The 200 N force
ii. The weight of the crate
iii. The normal contact force N.
b. Calculate the rate of work done against the frictional force F.