A 19.7 kg block is dragged over a rough,
horizontal surface by a constant force of 120 N
acting at an angle of 29.3° above the horizontal. The block is displaced 75.5 m, and the
coefficient of kinetic friction is 0.157.
The acceleration of gravity is 9.8 m/s².
120 N
29.3
19.7 kg
μ = 0.157
Find the work done by the force of friction.
Answer in units of J.