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Physics: Chapter P2 > Energy stores > Flashcards

Energy stores Flashcards

Definitions of energy stores

1
Q

Name the 8 energy stores

A

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

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2
Q

What is gravitational potential energy?

A

Gravitational potential energy is the energy that all stored matter has. It is directly proportional to the mass of an object, the distance that it is raised and the gravitational field strength at that point.

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3
Q

What is elastic potential energy?

A

Elastic potential energy is the store of energy that stretched or compressed objects contain

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4
Q

What is kinetic energy?

A

Kinetic energy is the store of energy that all moving matter has. It is directly proportional to the object’s mass and the square of its velocity

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5
Q

What is thermal energy?

A

Thermal energy is th store of energy that all objects with a temperature contain. The higher the temperature, the greater the thermal energy store

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6
Q

What is electrostatic potential energy?

A

Electrostatic potential energy is the store of energy due to the relative position of a charge in an electric field

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7
Q

What is magnetic energy?

A

Magnetic energy is the potential energy of a magnet

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8
Q

What is nuclear energy?

A

Nuclear energy is the store of energy found in the nuclei of atoms

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9
Q

What is chemical energy?

A

Chemical energy is the energy stored in the chemical bonds between molecules

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10
Q

What is the word equation for Elastic Potential Energy (energy stored in a spring)?

A

Elastic potential energy (energy stored in a spring) = 1/2 * spring constant * (extension)^2

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11
Q

What is the word equation for kinetic energy?

A

Kinetic energy = 1/2mass(speed)^2

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12
Q

What is the word equation for gravitational potential energy?

A

Gravitational potential energy = mass * gravitational field strength * height

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13
Q

What are the 4 means of energy transfer/work?

A

Mechanical, electrical, heating and radiation

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14
Q

What is mechanical energy transfer/work?

A

a force moving an object through a distance

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15
Q

What is electrical energy transfer/work?

A

charges moving due to a potential difference

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16
Q

What is energy transfer by heating?

A

due to temperature difference caused electrically or by chemical reaction

17
Q

What is energy transfer by radiation?

A

energy transferred as a wave, eg light and infrared - the Sun emits light radiation and infrared radiation. It does not need a medium

18
Q

What does it mean when ‘work’ is done?

A

Doing ‘work’ is the scientific way of saying that energy has been transferred.

Physics: Chapter P2 (8 decks)

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