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GCSE Physics · key term
A measure of how much one quantity changes per unit of another quantity.
Used by Edexcel and OCR
Specification 8.13 · Paper 2
How much a quantity changes per unit time.
Revise: Power EquationFor example, if two people do the same work by climbing the same stairs, the person who takes less time develops greater power. They have not necessarily done more work; they have done it at a faster rate.
Specification P2.1c, P8.1c · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A comparison describing how much one quantity changes per unit of another quantity, such as metres travelled per second.
Revise: Unit conversionA rate compares two quantities by division. It describes how much of one quantity corresponds to one unit of another.
Convert all quantities into compatible units before substituting them into a rate equation.
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