Power (Edexcel GCSE Physics): Flashcards

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1.1.10 Power
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What is power?

Rate at which energy is transferred or work is done

Power formula (using energy)

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

Power formula (using work)

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

What is the unit of power?

Watts (W)

What does 1 watt equal?

1 joule per second

Symbol for power in equations

PP

Unit for energy transferred in power formula

Joules (J)

Unit for time in power formula

Seconds (s)

Unit for work done in power formula

Joules (J)

Which motor is more powerful if both do same work

The one that completes the work faster

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