Energy (GCSE Physics)

Many know what it means for something to have lots of energy. Consider which has the most energy between:
A Bugatti Chiron at top speed or A Fiat Punto at top speed
A cup of cold water or A cup of boiling water
One way to describe energy is in terms of different types of energy store

## Energy stores

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#### Kinetic energy

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If an object is moving at some speed, it has some kinetic energy. The amount of kinetic energy an object has depends on two things: the object's mass (m), and the objects velocity (v). There is an equation that is used to calculate the amount of kinetic energy an object has in Joules (J).
E k = 1 2 m v 2 {\displaystyle E_{k}={\frac {1}{2}}mv^{2}}
Where Ek is Kinetic energy in Joules (J)
m is mass in kilograms (kg)
v is velocity in metres per second (m/s)

#### Thermal energy

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#### Gravitational potential energy

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#### Elastic potential energy

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#### Chemical energy

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### Quick Questions

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1. What is the equation used to calculate kinetic energy? (It links kinetic energy, mass, and velocity)
2. Which energy store describes the energy stored in food, fuel, and batteries?

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1  |  E k = 1 2 m v 2 {\displaystyle E_{k}={\frac {1}{2}}mv^{2}}
2  | Chemical

### Longer Questions

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1. Describe the energy transfers that occur in the action of boiling a kettle, lifting the kettle to pour, then placing the kettle back down.

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1  |

* Chemical energy is transferred to the house via electric current
* That energy is transferred to thermal energy in the heating element
* The thermal energy of the heating element is transferred to the thermal energy of the water
* When the kettle is lifted, work is done to increase the kettle's gravitational potential energy
* When pouring, the gravitational potential energy of the water is transferred to kinetic energy
* When the kettle is placed back down, its gravitational potential energy decreases

## Methods of energy transfer

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## Conservation of energy

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## Specific heat capacity

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## Thermal insulation

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## Energy resources

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### Renewable

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### Non-renewable

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Science Education in the UK

Key Stage 3|

* Energy
* Electricity and magnetism
* Forces
* Waves
* Matter
* Reactions
* The earth and space
* Organisms
* Ecosystems
* Genes

GCSE Physics|

* Energy
* Electricity
* Matter
* Radioactivity
* Forces
* Waves
* Magnetism
* Space
* Maths skills

GCSE Chemistry|

* Atoms and bonding
* Chemical calculations
* Chemical reactions
* Rates
* Organic Chemistry
* Chemical analysis
* The earth

GCSE Biology|

* Cells
* Organisation
* Disease
* Bioenergetics
* Biological responses
* Genes
* Interdependence
* Ecosystems

A-level|

* Physics
* Chemistry
* Biology

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