Question: A 15.0-kg block is dragged over a rough, horizontal surface by a 70.0-N force acting at 20.0 above the horizontal. The block is displaced 5.00

A 15.0-kg block is dragged over a rough, horizontal surface by a 70.0-N force acting at 20.0° above the horizontal. The block is displaced 5.00 m, and the coefficient of kinetic friction is 0.300. Find the work done on the block by
(a) The 70-N force,
(b) The normal force, and
(c) The gravitational force.
(d) What is the increase in internal energy of the block-surface system due to friction?
(e) Find the total change in the block’s kinetic energy.

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