Suppose that you drag a 16.8 kg trunk?

Question

over a rough surface by a constant force of 99.9 N acting at an angle of 29 degrees above the horizontal. You move the trunk over a distance of 79.3 m in a straight line.
The coefficient of kinetic friction is 0.111, and acceleration of gravity is 9.8 m/s^2.

How much is the work done on the block by the net force?? Answer in units of J.

Answer 1

Work=force * distance
=99.9N * 79.3 m
=7922.07 J

Answer 2

Only the horizontal component of the 99.9 N force does any work.