A crate of mass 28 kg is pushed up a ramp by a person as shown in the figure below. The person pushes the crate a distance of 12 m as measured along the ramp. Assume the crate moves at constant velocity. Assume the coefficient of kinetic friction between the crate and the ramp is
μK = 0.20.
Find the work done by gravity on the crate.
(The angle between ramp and floor is 30 degrees)

Question

A crate of mass 28 kg is pushed up a ramp by a person as shown in the figure below. The person pushes the crate a distance of 12 m as measured along the ramp. Assume the crate moves at constant velocity. Assume the coefficient of kinetic friction between the crate and the ramp is 
μK = 0.20.
 Find the work done by gravity on the crate.
(The angle between ramp and floor is 30 degrees)

anonymous · Answer

help meee

anonymous · Answer

Notice that the work done by gravity is only affected by the mass of the object and the height.
W=mgh. that's it.