Key term for OCR GCSE Physics A, used in Forces in action.
A relationship where two quantities increase at the same rate; if one is doubled, the other also doubles, producing a straight line through the origin on a graph.
Directly proportional appears in OCR GCSE Physics A revision content for Forces, especially Forces in action and Weight and gravity.
Forces
Forces in action • Weight and gravity
Waves in matter
Wave behaviour • Wave equation
Magnetism and magnetic fields
Magnets and magnetic fields • Field strength factors
Electricity
Simple circuits • Current, resistance, potential difference
Forces
Forces in action • Force and extension relationship
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