1. Is Mr Firth more powerful than a light bulb?

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

4. 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)

5. 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)

7. Power Calculations Complete summary questions