What are some examples of helpful and unhelpful frictions?

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19-11-2014
Physics

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What are some examples of helpful and unhelpful frictions?

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cel123 cel123 · Answer 1 · 2014-11-19T19:31:49-05:00

cel123 cel123

19-11-2014

helpful friction would be the friction on something that you wanted to stop (a car) while unhelpful friction is friction on something that you want to keep going (a curling rock)

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