WWFfan2000 WWFfan2000

17-09-2016
Physics

contestada

In machines and engines,A. there will be no friction.B. friction increases fuel efficiency.C. the process of overcoming friction uses valuable fuels.

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CaptainBeyond CaptainBeyond

22-09-2016

Think of a car, when we have to add oil. If we didn't then the friction would cause so much heat that the engine would break and fall apart.

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