SI units and unit conversion
What SI units and unit conversion means in Physics GCSE, as defined for AQA, OCR.
Definitions of SI units and unit conversion
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Reference: AQA
Keep units consistent before substituting, converting grams to kilograms and kilometres per hour to metres per second where needed.
Mass is measured in kilograms, force in newtons and acceleration in m/s², and grams are converted to kilograms before calculating.
Topics that use SI units and unit conversion
- Newton's Second Law (AQA GCSE)
- Newton's laws (OCR GCSE)
Related terms
- balanced forces
- Inertial mass
- Mass
- Newton's second law
- Resultant force
- a = Δv ÷ t
- Acceleration
- changing direction
Using SI units and unit conversion in the exam
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