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Physics > Energy > Flashcards

Energy Flashcards

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Physics 101 flashcards AP® Physics flashcards
1
Q

What are the 9 types of energy?

A

Kinetic Energy (KE)
Gravitational Potential Energy (GPE)
Elastic Potential Energy (Elastic PE)
Chemical Energy
Electrical Energy
Nuclear Energy
Light Energy
Sound Energy
Heat Energy

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2
Q

What is Kinetic energy?

A

Energy in a moving object,
eg. A moving car

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3
Q

What is GPE?

A

Energy due to the height of an object,
eg. A skier on a slope

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4
Q

What is Elastic PE?

A

Energy in a stretched or compressed object,
eg. a spring

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5
Q

What is Chemical energy?

A

Energy contained in food or fuel,
eg. Food and petrol

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6
Q

What is Electrical Energy?

A

Energy in the flow of electrons
Eg: A battery

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7
Q

What is Nuclear Energy?

A

Energy released when the nucleus of an atom slips

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8
Q

What is Light energy?

A

Energy given out by any hot object
Eg: The sun, light bulb

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9
Q

What is sound energy?

A

Energy given out by any vibrating objects,
Eg: A loud speaker

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10
Q

What is heat energy?

A

Energy contained in any hot or warm object,
Eg: Burning coal

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11
Q

What is Potential Energy?

A

Is energy due to the height

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12
Q

What is PE formula?

A

Mass (kg) x gravity (10m/s) x height (m)
M x g x h

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13
Q

What happens to PE when an object falls?

A

Its converted into Kinetic Energy
Kinetic energy gained = potential energy lost

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14
Q

What is Kinetic Energy?

A

Kinetic energy is the energy of movement.
Anything moving has kinetic energy

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15
Q

What is the formula for kinetic energy?

A

Kinetic energy (KE) = 1⁄2 x mass x velocity2

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16
Q

What is the unit of mass?

A

Kg

17
Q

What is the unit of velocity?

A

m/s

18
Q

What is the formula for velocity?

A

2KE
V= √.———
m

19
Q

What is the formula for mass ?

A

2KE
m= ————
V²

20
Q

In a circuit where is energy supplied from?

A

Energy is transferred from cells and other sources
Eg: batteries

21
Q

If there are no resistive forces in a circuit what happens to the energy?

A

When there are no resistive forces, total energy remains constant.

22
Q

What is the energy rule ?

A

Energy cannot be created or destroyed, but only changed from one form into another.

23
Q

How is energy usually lost?

A

Usually, some energy is used up doing work against friction and air resistance → lost as heat.

Physics (8 decks)

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