callumking23 callumking23
  • 19-11-2014
  • Physics
Answered

What are some examples of helpful and unhelpful frictions?

Answer :

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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