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Published bySilas Finchum Modified over 4 years ago

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Is Mr Firth more powerful than a light bulb?

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What is Power? Power is measured in watts (W) and tells you how much energy a device can transfer in one second. Naomi

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Mr Firth Can lift a dumbell in 0.5 seconds, this gives the dumbell 150 J of gravitational potential energy. What is his power? Power (W) = Energy transferred (J) / Time (s)

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Light Bulb Can transfer 5000J of electrical energy into light energy in 25 seconds. What is it’s power? Power (W) = Energy transferred (J) / Time (s)

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Power Calculations Complete summary questions

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The rate at which work is done.

The rate at which work is done.

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