Problem 1.1:
A 10 kg object experiences a horizontal force which causes it to accelerate at
5 m/s2, moving it a distance of 20 m, horizontally. How much work is
done by the force?
[Solution]
Problem 1.2:
A ball is connected to a rope and swung around in uniform circular motion. The
tension in the rope is measured at 10 N and the radius of the circle is 1 m. How
much work is done in one revolution around the circle?
[Solution]
Problem 1.3:
A crate is moved across a frictionless floor by a rope THAT is inclined 30
degrees above horizontal. The tension in the rope is 50 N. How much work is done
in moving the crate 10 meters?
[Solution]
Problem 1.4:
A 10 kg weight is suspended in the air by a strong cable. How much work is done,
per unit time, in suspending the weight?
[Solution]
Problem 1.5:
A 5 kg block is moved up a 30 degree incline by a force of 50 N, parallel to the
incline. The coefficient of kinetic friction between the block and the incline
is .25. How much work is done by the 50 N force in moving the block a distance
of 10 meters? What is the total work done on the block over the same distance?
[Solution]
