Power (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards

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Power
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Power definition (energy)

Rate at which energy is transferred

Power definition (work)

Rate at which work is done

Power formula (energy)

P=EtP = \frac{E}{t}

Power formula (work)

P=WtP = \frac{W}{t}

Unit of power

Watts (W)

EE unit in power equation

Joules (J)

tt unit in power equation

Seconds (s)

WW unit in power equation

Joules (J)

1 joule per second equals

1 watt

Power in watts represents

Rate of energy transfer or work done

Which motor is more powerful (same work)?

The one that completes work faster

Why is a faster motor more powerful?

Energy transferred at faster rate

Explore OCR GCSE Physics A, Combined (Gateway Science Suite) Revision Notes by Topics

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Energy Changes in a System

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Energy Changes in a System

National & Global Energy Resources

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Energy Changes in a System

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