AQA Physics Unit 1 - Important Equations

AQA Physics Unit 1 - Important Equations 

Some equations you WILL need for the Unit One Exam. 


REMEMBER: These can be rearranged using simple Algebra. And remember to watch out for units!

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  • Created by: PhilMoze
  • Created on: 15-01-11 22:06






EFFICIENCY (%?) = Useful energy transfer/

                                            Total Energy Transfer


I.e 100 Watts go into a lightbulb. Only 5 Watts get's converted into light = 0.5 or 5% efficiency.

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Energy Transfer



Energy Transferd (kWh) =  Power (kW) x

                                                            Time (hours)


I.e 7kw Shower, is on for 3 hours. 7x3 = 14 kWh

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Cost of Electric



Total Cost =              Number of kWh (kWh) x

                                             Cost Per kWh (hours)


I.e a family uses 500 kWh, each one costing 5p. 500x5 = 2500p or £25

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WaveSpeed (m/s) =  Frequency (hz) x

                                             Wavelength (metre's)


I.e A wave has a frequency of 3000Hz, and a wavelength of 1 metre. 

3000 x 1 = 3000 m/s

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Power (W) =     energy transferred (J)     ÷ time taken (s)

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thank you, just what i needed :)

the real barack obama


thankyou, this is great for what i need to know!

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