What are some examples of helpful and unhelpful frictions?

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asked May 23, 2015 139k views

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What are some examples of helpful and unhelpful frictions?

Physics
high-school

Vitruvius asked

by Vitruvius

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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)

Abdoulsn answered May 29, 2015

by Abdoulsn

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