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Physics Y9 > Energy > Flashcards

Energy Flashcards

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1
Q

What is energy?

A

Capacity to do work

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2
Q

How can we store energy?

A

Batteries
Fuel

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3
Q

What can we do with energy?

A

Transfers from one store to another

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4
Q

What can we NOT do with energy?

A

Can’t make it
Can’t destroy it

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5
Q

What are the 8 types of energy?

A

Chemical
Thermal
Kinetic
Gravitational potential
Elastic potential
Magnetic/electrostatic
Nuclear
Vibration

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6
Q

How can we store chemical energy?

A

Batteries or things we can eat or burn

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7
Q

How can we store thermal energy?

A

Anything hot

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8
Q

How can we store kinetic energy?

A

Anything moving

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9
Q

How can we store gravitational potential energy?

A

Anything that can fall

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10
Q

How can we store elastic potential energy?

A

Anything stretchy

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11
Q

How can we store magnetic/electrostatic energy?

A

Anything with a magnetic or electric field

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12
Q

How can we store nuclear energy?

A

Any nucleus of any atom

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13
Q

How can we store vibration energy?

A

Anything vibrating oscillating

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14
Q

What is the law of conservation of energy?

A

Can’t be destroyed or created
Only transferred between stores

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15
Q

What is efficiency?

A

A percentage of the total energy being put into a system that is being transferred into useful energy

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16
Q

What is the equation for efficiency?

A

Efficiency= useful energy output/total energy input x 100

17
Q

What happens when the work is done?

A

Energy is transferred

18
Q

What is the equation for gravitational potential energy?

A

E=m x g x h
GPE x mass x gfs x height

19
Q

What is energy measured in?

A

Joules
J

20
Q

What is gravitational field strength measured in?

A

N/kg

21
Q

What is the equation for kinetic energy?

A

E= 0.5 x m x v2
Kinetic energy=0.5x mass x velocity2

22
Q

What is velocity measured in?

A

m/s

23
Q

What is the unit for work done?

A

Joule

24
Q

What is the equation for work done?

A

Work done= force x distance moved in direction of force
J=N x m

Physics Y9 (7 decks)

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