Physics Quiz

In which situation is there work done on the system?

• a basket being lifted

• a man carrying a bag of cement

• a boy pushing against the wall

• a weightlifter holding a barbell in the air

A rock is thrown straight up from the surface of the Earth. Which one of the following statements describes the energy transformation of the rock as it rises? Neglect air resistance.

• The total energy of the rock increases.

• The kinetic energy increases and the potential energy decreases.

• Both the kinetic energy and the potential energy of the rock remain the same.

• The kinetic energy decreases and the potential energy increases.

_______ happens when a force causes an object to move in the same direction that the force is applied.

• Work

• Power

• Energy

• Heat

Energy is

• the ability to do work.

• the work needed to create potential or kinetic energy.

• the work that can be done by an object with PE or KE.

• all of the above.

Which of the following happens to a coconut that falls freely?

• Loses PE and gains KE

• Loses both PE and KE.

• Gains PE and loses KE

• Gains both PE and KE

A torchlight fell from a watch tower. The potential energy of the torchlight at the highest point compared to its kinetic energy at the lowest point is

• lesser.

• equal.

• greater.

• not related.

The wind-up toy that is fully wound and at rest possesses

• kinetic but no potential energy

• potential but no kinetic energy

• both potential and kinetic energy in equal amounts

• neither potential nor kinetic energy

In which case is there a decrease in gravitational potential energy?

• Amada stretches horizontally a rubber band.

• A car ascends a steep parking ramp.

• Pamela's puppy jumps down the chair.

• Water is forced upward through a pipe.

Which one has more kinetic energy and why? A baseball or a soccer ball

• a soccer ball because it is bigger

• a soccer ball because it is lighter

• a baseball because it is smaller

• a baseball because it is heavier

How can you increase the potential energy of a diver in the Olympics?

• go to a higher diving board

• go to a lower diving board

• work out and loose weight

• jump