1. A monkey drops a 150-kg box of bananas. The box falls 3.5 m. How much work is done by
gravity?
2. A 1,200-kg car uniformly accelerates from rest to 80 m/s in 6.0 s. Find the net work done.
3. A 30-kg box slides 10.0 m down a 40° incline. The coefficient of friction between the box
and the incline is 0.75. Find the work done by gravity.
4. A man pulls on a box of coffee with a force of 300 N. The box of coffee travels 15 m along a
straight line. The angle between the man’s pull and the displacement is 50°. How much
work does the man do?
5. As illustrated below, a woman pulls a 20-kg box of books with a force of 160 N at an angle of
30° above the horizontal. The coefficient of friction between the box and the ground is 0.29.
The box travels 13.0 m. Find the work done by the woman’s pull. Find the work done by the
friction force.
6. A 15 kg mass moves along x-axis. Its acceleration as a function of its position is shown in the
figure. What is the total work done on the mass by the force as the mass moves from x = 0
to x = 15 cm?
7. The relationship between force and position is shown in
the figure given (in one dimensional case). What is the
work done by the force in displacing a body from x – 1 cm
to x – 5 cm?
8. The graph between the resistive force F acting on a body
and the distance covered by the body is shown in the
figure. The mass of the body is 30 kg and initial velocity is
2 m/s. When the distance covered by the body is 5m, its
kinetic energy would be __________.