Energy Types and Law of Conservation of Energy

Which of the following energies are potential?

• Electrical

• Chemical

• Gravitational

• Thermal

• Elastic

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The ability to do work or cause change.

• The Law of Conservation of Energy

• Energy

• Work

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States that energy cannot be created nor destroyed.

• The Law of Conservation of Energy

• Energy

• Work

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Which of the following energies are kinetic?

• Electrical

• Chemical

• Gravitational

• Thermal

• Elastic

Occurs on an object when a force causes the object to move a distance.

• The Law of Conservation of Energy

• Energy

• Work

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NGSS.MS-PS3-5

Which of the following demonstrates an airplane converting kinetic to potential energy?

• It ascends to a higher altitude.

• More passengers board the plane.

• It moves downward to make a landing.

• The wheels spin as it moves on the ground.

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The law of conservation of energy describes how the amount of total energy can change in a closed system. Which of these statements correctly describes this law?

• The amount of kinetic energy in a system is a constant value.

• Energy can be converted from one form into another, but it cannot be created or destroyed.

• An object can have potential energy or kinetic energy, but not both at the same time.

• The amount of energy created when an object moves is equal to the energy destroyed when it stops moving.

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Which of these is an example of the conversion of gravitational potential energy into kinetic energy?

• a person running on a level track

• an apple falling from a tree to the ground

• a wind-up spring making a toy car move acroos the floor

• a rubber band being stretched to twice its normal length

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Mechanical energy is the sum of two types of energy-kinetic energy and potential energy of position. Which of the following is an example of an object that has kinetic energy?

• a snail crawling across a leaf

• a computer monitor sitting on a desk

• a tightly wound spring in a windup toy

• a roller coaster car just before it goes downhill

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Matt and Kim use bowling balls with different masses. If they both roll their bowling balls at exactly the same speed, which claim could be supported by the evidence?

• The bowling ball with less mass has more kinetic energy.

• The bowling ball with more mass has more kinetic energy.

• The kinetic energies of the two bowling balls are the same.

• There is not enough information to compare the kinetic energies.

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