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Yr9 Physics > Energy > Flashcards

Energy Flashcards

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1
Q

What are the 9 energy stores?

A 
Kinetic energy
Thermal energy
electrical energy
chemical energy
magnetic energy
nuclear energy
Gravitational potential
elastic potential
Electrostatic energy
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2
Q

How is energy transferred from the kettle?

A

transferred from electric energy to thermal energy and is also transferred by thermal energy

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3
Q

Work def

A

Is the energy transfer that takes place when a force causes an object to move

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4
Q

What is the relationship between work done and energy transfer?

A

Same thing

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5
Q

Work done=

equation

A

Force applied*disatnce moved

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6
Q

Force applied* disatnce moved=

A

work done

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7
Q

Work done is measured in..

A

Joules(j)

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8
Q

Force is measured in…

A

newtons(n)

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9
Q

Distance is measured in…

A

metres

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10
Q

Triangle for work done, force, disatnce

A

W(at top)

F( force) D( distance

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11
Q

Equation for work done, power and time

A

W

P T

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12
Q

Power is measured in…

A

Wats

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13
Q

Time is measured in…

A

seconds

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14
Q

Kinetic energy increase as GPE …in a pendulum

A

decreases

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15
Q

GPE increases as kinetic energy… in a pendulum

A

decreases

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16
Q

Do appliances use all of their energy usefully?

A

no

dissipation

17
Q

Energy transfered by appliances make the surrounding…

A

warmer

18
Q

Gravitational potential=

equation

A

Massgravitational field strengthheight

19
Q

How much is the gravitational strenght on Earth

A

10N

20
Q

Would there be more GPE on you standing on the mountain or you standing on the sea level ground?

A

Mountains

21
Q

The higher something gets the… GPE it will have

A

more

22
Q

Massheightgravitational strength=

A

GPE

23
Q

GPE=

A

Gravitational potential

24
Q

What is the relationship between KE and kinetic energy?

A

Same

25
Q

KE=

Equation

A

0.5mass velocity squared

26
Q

30 KE would be how many GPE? Why?

A

30 because it s the same number as the Ke and GPE nad vice versa

27
Q

How do you calculate energy efficiency?

A

energy efficiency= Useful output energy /total input energy

28
Q

Force is to extension

A

proportional

29
Q

What is the force measured in?

A

N/M

30
Q

what is extension measured in?

A

metres

31
Q

Force=

equation

A

spring constant*extension

32
Q

Triangle for force, spring constant and extension

A

F

K E

33
Q

Elastic potential energy=

equation

A

o.5spring constantextension squared

Yr9 Physics (8 decks)

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