Unit 2 Review

Which type of energy is changed by plants into chemical energy?

• solar
• nuclear
• gravitational
• thermal

A roller coaster is climbing up the highest hill on its track. At which point will the front car of the coaster most likely have its greatest potential energy?

• at the bottom of the highest hill
• at the top of the highest hill
• at the start of the track
• at the end of the track

The diagram shows a 21.7-kg ball located on a shelf 1.6 m above the ground.

Which best describes the energy of the ball?

• It has mechanical energy in the form of potential energy.
• It has mechanical energy in the form of kinetic energy.
• Its energy depends upon the speed the ball will travel.
•  Its energy is lost once it falls off the shelf.

This diagram shows the motion of a ball down a hill.
What happened to the ball’s energy from Point 1 to Point 4?

• Stored energy was transformed into energy of motion.
• Energy of motion was transformed into chemical energy.
• Stored energy in the ball applied a force to get the ball to move.
• Internal energy caused the ball to move until the energy was gone.

The diagram shows a child swinging on a swing set.

As the child moves from left to right, at which point will the maximum kinetic energy be reached?

• 1
• 2
• 3
• 4

As a roller coaster car travels down a hill, which type of change in energy allows it to speed up?

• kinetic energy changing into potential energy
• kinetic energy changing into heat energy
• potential energy changing into kinetic energy
• potential energy changing into heat energy

Which form of energy does a car’s engine convert into mechanical energy?

• light
• wind
• chemical
• gravitational

Look at the drawing of the ball bouncing below.
Which of the following is the correct sequence of words to use to indicate the different types of energy shown in the drawing?

• potential, potential, kinetic, kinetic
• potential, kinetic, potential, kinetic
• potential, kinetic, kinetic, potential
• kinetic, potential, potential, kinetic

Barbara placed a marble at different places on a ramp. At which place will the marble have the most potential energy?

• a
• b
• c
• d

In a gasoline-powered car, chemical energy from gasoline is transformed to make the car move. The motion of the car is what form of energy?

• radiant energy
• nuclear energy
• electrical energy
• mechanical energy