Law of Conservation of Energy

The rock in the picture is pushed over the edge and it begins to fall. Which type of energy conversion is taking place?

• mechanical to heat

• sound to mechanical

• potential to kinetic

• kinetic to potential

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A ball is projected into the air. Where is potential energy the greatest?

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Which point on the roller coaster's path represents the maximum potential energy?

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As a roller coaster goes downhill

• kinetic energy is converted into potential energy.

• potential energy is converted into kinetic energy.

• electrical energy is converted into potential energy.

• potential energy is converted into electrical energy.

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When gasoline is burned in a car engine, ________ energy is converted into _________ energy.

• heat, chemical

• chemical, potential

• mechanical, chemical

• chemical, mechanical

What form of energy does a compressed spring have?

• heat energy

• kinetic energy

• chemical energy

• elastic potential energy

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NGSS.MS-PS3-2

A drawn bow possesses mechanical energy in the form of _______________. After the arrow is released, the energy is transformed into _________________.

• potential energy; mechanical energy

• elastic potential energy; kinetic energy

• gravitational potential energy; kinetic energy

• elastic kinetic energy; mechanical kinetic energy

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Energy can be created.

• True
• False

The Law of Conservation of Energy states:

• Energy can created or destroyed but not transformed

• Energy cannot be created or destroyed, it can only transformed

• Energy can't be created, destroyed or transformed

• Energy cannot be created or destroyed.

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What is the formula for Kinetic Energy?

• KE = mass x velocity

• KE= 1/2 x mass x velocity ²

• KE = mass x gravity x height

• KE = mass x velocity / 2

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