The video tutorial explains energy conversion using hand rubbing as an example, introducing the law of conservation of energy, which states that energy cannot be created or destroyed but can change forms. A pendulum activity demonstrates this principle, showing how potential energy converts to kinetic energy and vice versa. The video also discusses energy dissipation due to friction, explaining that in the absence of air, such as in outer space, energy would not dissipate. The tutorial concludes by summarizing the forms of energy and the conservation principle.

What type of energy is generated when you rub your hands together?

• Potential energy

• Chemical energy

• Heat energy

• Kinetic energy

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NGSS.MS-PS3-5

Which law states that energy cannot be created or destroyed?

• Law of Conservation of Energy

• Law of Inertia

• Law of Thermodynamics

• Law of Motion

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NGSS.MS-PS3-5

What materials are needed for the activity demonstrating the law of conservation of energy?

• A book, a rope, and a table

• A ball, a string, and a stand

• A pen, a string, and a chair

• An eraser, a thread, and an iron stand

What happens to the potential energy of the eraser when it is released from point A?

• It disappears

• It increases

• It remains constant

• It changes into kinetic energy

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NGSS.MS-PS3-5

Why does the eraser eventually stop swinging?

• It gains more potential energy

• Energy is dissipated as heat due to friction with air

• It loses all its energy

• It gains more kinetic energy

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What would happen to the eraser if the activity was performed in outer space?

• It would move in a straight line

• It would gain more energy

• It would swing forever

• It would stop immediately

What happens to the kinetic energy of the eraser at point B?

• It becomes maximum

• It changes into potential energy

• It remains constant

• It disappears

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NGSS.MS-PS3-5

What is the main conclusion of the eraser activity?

• Energy is conserved and changes form

• Energy is created and destroyed

• Energy is lost completely

• Energy remains in one form

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NGSS.MS-PS3-5

Between points A and C, what forms of energy does the eraser possess?

• Only potential energy

• Neither kinetic nor potential energy

• Both kinetic and potential energy

• Only kinetic energy

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NGSS.MS-PS3-2

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In the absence of friction, what can be observed about the total energy in a system?

• It decreases

• It increases

• It remains constant

• It fluctuates