Over the last few days, we have learnt about a new force called ‘friction’. It is the force (or in this case, resistance) between two surfaces that are in contact with one another. We have tested it in many different ways: trying to move Euro coins on salt, rolling and sliding rocks on different surfaces, testing the effect of oil on the level of friction…. See if you can think of any other examples where friction is making life easier or more difficult.
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