G9_Post Test 3

Which among the forms of energy is considered potential energy?

• gravitational

• radiant

• sound

• thermal

What is the energy of a motorcycle moving slowly at the top of a hill?

• entirely kinetic

• entirely potential

• entirely gravitational

• both kinetic and potential

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 at equal amount

• neither potential nor kinetic energy

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

• Amanda stretches horizontally a rubber band.

• A car ascends a steep parking ramp.

• Pamela’s puppy jumps down the chair.

• Water is forced upward through the pipe.

You drop a 3 kg object from a height of 3 meters. What is its potential energy when it hits the ground?

• 0 J

• 9 J

• 9.8 J

• 88.2 J

Which event does not describe potential energy changed into kinetic energy?

• A box sliding down a ramp.

• A mango falling from a tree.

• A pen spring being compressed.

• A stretched rubber band was loosened

As the kinetic energy of a falling objects increases, its potential energy _____.

• increases

• decreases

• remains the same

• none of the choices

What happens to the kinetic and potential energy when an object is moved against gravity, such as rolling a toy car up a ramp?

• Kinetic energy does not change.

• Potential energy does not change.

• Kinetic energy is transformed into potential energy.

• Potential energy decreases as it is transformed into kinetic energy

As the cars of a rollercoaster race down a track, energy transformation takes place. Which of the following is true?

• Some energy is destroyed as the cars slow down.

• Potential energy is transformed to kinetic energy and other forms of energy

• The kinetic energy of the cars is always equal to the potential energy of the car.

• Kinetic energy is stored in the cars as they moved down the track.

As the pendulum swings from its lowest to highest position, what happens to its kinetic and potential energy?

• Both the potential and kinetic energy decreases.

• The kinetic energy decreases while the potential energy increases.

• The potential energy decreases while the kinetic energy increases.

• Both the potential and kinetic energy increases.