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: The [[Normal Contact Force|normal contact force]] is a [[force]] which always acts [[perpendicular]] to the boundary between two surfaces.
: [[Pressure]] is due to a [[force]] which is [[perpendicular]] to the surface of an [[object]].
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Normal (line), pages 202-3, 205, GCSE Physics; Student Book, Collins, AQA '']