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| style="height:20px; width:200px; text-align:center;" |The submarine produces [[thrust]] by sending [[water]] backwards very quickly using the propeller. The [[water]] provides a [[Reaction Force|reaction force]] equal in [[magnitude]] but opposite in direction causing the submarine to [[accelerate]].
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===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 ''Thrust force, pages 142, 156, GCSE Physics; Student Book, Collins, 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 ''Thrust SSC, page 150, GCSE Physics; Student Book, Collins, AQA '']
:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Thrust, page 118, GCSE Physics; Third Edition, Oxford University Press, AQA '']