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:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Acceleration; calculations, pages 52-53, 56-57, 69, 255, Gateway GCSE Physics, Oxford, OCR '']
:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Acceleration; due to gravity, page 83, Gateway GCSE Physics, Oxford, OCR '']
==Key Stage 5==
===Meaning===
[[Acceleration]] is the rate of change of [[velocity]] per unit [[time]].
===About Acceleration===
*It can be positive (speeding up) or negative (slowing down), also called deceleration.
*[[Measure]]d metres per [[second]] squared (m/s²).
*Can be caused by changes in [[speed]] or direction.
===Examples===
*A car [[Accelerate|accelerating]] from a stoplight.
*The [[acceleration]] due to [[gravity]] is 9.8 m/s² downwards.