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Physics > p1 energy stores > Flashcards

p1 energy stores Flashcards

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1
Q

There are 7 stores of energy
What are they

A

Kinetic energy
Thermal energy
Elastic potential energy
Gravitational potential energy
Chemical energy
Magnetic energy
Electrostatic energy

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2
Q

What is the law of conservation of energy

A

Energy cannot be created or destroyed, only transferred from one store to another

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3
Q

There are 4 transfers of energy
What are they

A

Mechanical working
Electrical working
Heating by particles
Heating by radiation

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4
Q

What is the equation for work done

A

W=Fxs

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5
Q

What does “W” stand for in work done

A

Work

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6
Q

What does “F” stand for in work done

A

Force

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7
Q

What does “s” stand for in work done

A

Distance

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8
Q

What are the measurement’s of the equation for work done

A

Joules Newtons meters

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9
Q

How would you set up a work done triangle

A

W
Fxs

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10
Q

What is mass

A

Mass is a measure of the physical amount of material in an object

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11
Q

What is weight

A

Weight is a measure of the force from gravity acting on a mass

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12
Q

What is the equation for calculating weight and mass

A

W
mxg

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13
Q

What does “W” stand for in weight and mass

A

Weight

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14
Q

What does “m” stand for in weight and mass

A

mass

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15
Q

What does “g” stand for in weight and mass

A

gravity

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16
Q

What is the gravity on earth

A

9.8

17
Q

What are the measurements of weight, mass and gravity

A

Newtons, kg, N/per kg

18
Q

What is the equation for gravitational potential energy

A

Eg=mxgxh

19
Q

An object which is _______ has more gravitational potential energy

A

higher

20
Q

An object with a higher _____ will be storing more GPE

A

mass

21
Q

What is the triangle for calculating GPE

A

eg
mxgxh

22
Q

What are the measurements in the GPE equation

A

Energy, kg, n/kg , m

23
Q

What is the equation for kinetic energy

A

Ek=0.5xmxv2

24
Q

what does “v” stand for in kinetic energy

A

velocity

25
Q

What does “m” stand for in kinetic energy

A

mass

26
Q

how would you set up a kinetic energy equation triangle

A

Ek
0.5 x m x v2

27
Q

how do you calculate velocity

A

v= distance /time

28
Q

What is the equation for elastic potential energy

A

Ee=0.5x k x e2

29
Q

What does “k” stand for in elastic potential energy

A

spring constant

30
Q

What does “e” stand for in elastic potential energy

A

extension

31
Q

What is the equation for efficiency

A

Useful output/ total output

32
Q

energy can be _____ or wasted

A

useful

33
Q

Friction always causes energy to move to the ____ store

A

thermal

34
Q

input energy = _____________ + wasted output energy

A

useful output energy

35
Q

Efficiency must always be smaller than what number

A

1

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