# Is Mr Firth more powerful than a light bulb?. What is Power? Power is measured in watts (W) and tells you how much energy a device can transfer in one.

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Is Mr Firth more powerful than a light bulb?

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

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)

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)

Power Calculations Complete summary questions

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