Energy Transfer in Motion

Kinetic energy is

• the energy an object has because of its motion

• the balance of all energies in an object

• the total energy in a system

Potential energy is

• the energy an object has because of its motion

• the energy that is stored in a system or object

• the total energy in a system

At what point does the roller coaster car have the most potential energy?

• W

• X

• Y

• Z

A ball rolls across the floor. Because of friction, the ball will eventually slow down to a stop. Which of the following is evidence of energy transfer resulting from the motion of the ball?

• the force of friction decreases

• Gravity is acting on the spheres

• Energy will be transferred between the spheres

The total kinetic energy of two cars is measured before and after they crash into each other. The total kinetic energy of the two cars after the crash is less than the total kinetic energy before the crash. Which of the following best explains the loss of kinetic energy?

• Some of the cars' kinetic energy was converted to sound and heat energy

• both of the cars were being pulled downward by the force of gravity

• energy in a system is always lost

Which of the following conditions is necessary in order to change the acceleration of an object?

• Energy must move into or out the object

• the total mass of the object must increase

• all forces acting on the object must be in balance.

When the dish is on the countertop, it has potential energy. When the dish falls, some of the potential energy changes to kinetic energy. As the dish hits the floor and breaks, what types of energy have some of the kinetic energy been transferred to?

• Light energy and potential energy

• potential energy and thermal energy

• sound energy and kinetic energy

Kinetic energy can be transformed inot

• heat energy

• light energy

• sound energy

• all of the above

A book sitting on a table has potential energy becaus eof the gravitational pull of the Earth. Which of the following would increase the potential energy of the book?

• lifting it to a high shelf

• opening it to the middle

• dropping it on the floor

Energy due to motion is ____________ energy. 

• Potential 
• Energy
• Kinetic
• Friction

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