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Contact forces - Explaining motion: Video playlist - BBC Bitesize
James Stewart explains contact force: tension, normal contact force, friction and air resistance.
↗ https://www.bbc.co.uk/bitesize/topics/z3gswsg/watch/z22nmbkJames Stewart explains contact force: tension, normal contact force, friction and air resistance.
↗ https://www.bbc.co.uk/bitesize/topics/z3gswsg/watch/z22nmbk