posted by help! on .
A rope is used to pull a 3.57 kg block at constant speed 5.10 m along a horizontal floor. The force on the block from the rope is 6.82 N and is directed 15° above the horizontal.
(a)What is the work done by the rope's force?
(b) What is the increase in the thermal energy of the block-floor system?
(c) What is the coefficient of kinetic friction between the block and floor?