A man pushes a crate of mass m = 149.2 kg up along a d = 4.00 m ramp that makes an angle of 20.0º with the horizontal (see picture above). He exerts a force of F on the crate parallel to the ramp and moves at a constant speed. Assume there is no friction along the incline, and d is the distance parallel to the incline, not the height. 

A) Calculate the force F.

B) Calculate the work done on the crate by F. 

C) Calculate the work done on the crate by gravity. 

D) Calculate the network. 

E) Calculate the net work if instead the crate was raised at a = 1.0

Answer rating: 100% (QA)

A Force F parallel to the ramp Identify relevant forces Force of gravity mg acting straight down Normal force N exerted by the ramp perpendicular to t... View the full answer