1. What does the law of conservation of mechanical energy state?

• A. Potential energy is always equal to kinetic energy

• B. Potential energy is always converted to kinetic energy

• C. There is always some energy lost as heat

• D. For any system the total amount of mechanical energy remains the same

Tags

NGSS.MS-PS3-5

2. Why would a system have less energy than it originally started with?

• A. The energy was lost as heat.

• B. The energy was destroyed.

• C. More energy was created at the beginning than at the end.

• D. The temperature was too low to create heat.

Tags

NGSS.HS-PS3-4

3. Which best describes potential energy?

• A. Energy of motion

• B. Energy as heat

• C. Stored energy

• D. Energy that is doing work

Tags

NGSS.MS-PS3-2

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

• A. Loses potential and gains kinetic energy.

• B. Loses both potential and gains kinetic energy.

• C. Gains potential and loses kinetic energy.

• D. Gains both potential and kinetic energy.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

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

• A. kinetic but no potential energy

• B. potential but no kinetic

• C. both potential and kinetic energy in equal amounts

• D. neither PE nor KE