Physics test 10.10.17

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Created on: 08-10-17 18:56

What is work and energy measured in?

Joule (J)

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Word equation for work done

force x distance moved in direction of force

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What does work done equal?

energy transferred

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What is power?

The rate at which energy is transferred

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Equation for power

work done/time taken

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What is power measured in?

Watt (w)

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Conservation of energy

Energy can neither be created or destroyed only transferred or dissipated into the surroundings.

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Equation for efficiency

useful energy output/ total energy input

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Wasted energy

It is usually in a form that is not useful and is eventually dissipated into the surroundings as heat

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How is gravitational potential energy gained

By an object because of its height.

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Word equation for gpe

Mass x gravitational field strength x height

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Word equation for Kinetic energy

1/2 x mass x velocity squared

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What is weight

Mass x gravitational field strength

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What is a renewable energy resource? (9)

Hydroelectric, tidal, wave, solar, fossil fuel, nuclear, wind, bio-fuel and geothermal

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What are energy resources used for?

Heating, electricity and transport

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Science is able to identify the disadvantages of energy resources but does not have the power to deal with it due to social, political, economic and ethical concerns

Why can't we fix the disadvantages of the current energy resources?

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Energy stores

Chemical, thermal, kinetic, gravitational potential, elastic and nuclear

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Energy transfers

sound, light, electrical

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Other cards in this set

Card 2

Front

Word equation for work done

Back

force x distance moved in direction of force

Card 3

Front

What does work done equal?

Back

Card 4

Front

What is power?

Back

Card 5

Front

Equation for power

Back

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Physics test 10.10.17