1. Work is done when
(a) A force is applied.
(b) A person tries unsuccessfully to move a crate.
(c) Force is applied and an object is moved.
2. Power
(a) Is work divided by time.
(b) Is measured in newtons.
(c) Is time divided by work.
(d) None of the above.
3. A large boulder at rest possesses
(a) Potential energy.
(b) Kinetic energy.
(c) No energy.
4. A large boulder rolling down a hill possesses
(a) Potential energy.
(b) Kinetic energy.
(c) No energy.
(d) Both kinetic and potential energy.
5. With no air resistance and no friction, a pendulum would
(a) Not swing.
(b) Swing for a short time.
(c) Swing forever.