A 5.0 kg box slides down the ramp of a loading dock. The length of the ramp is 1.0 m, and it is inclined at an angle of 30.0° from the ground. (a) Calculate the change in potential energy of the box...

A 5.0 kg box slides down the ramp of a loading dock. The length of the ramp is 1.0 m, and it is inclined at an angle of 30.0° from the ground.

(a) Calculate the change in potential energy of the box as it moves down the ramp.

(b) As the box moves down the ramp, it experiences a frictional force of 10.0 N. What is the speed of the box as it reaches the bottom?

(c)Without frictional losses, will the speed of the box at the bottom of the ramp be higher or lower? Why? Use the accounting equation in your explanation.