1. A box rests on a 30 degree incline at a height of 3 meters.
Determine the work done by friction as the object slides down the
incline, given that the coefficient of friction between the box on
the incline is 0.45. For the box in the previous problem, what will
the speed of the box be at the bottom?A roller coaster has an
initial hill of height "h". If the coaster slides down and then
rolls through a loop...