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Rolling friction is caused by ____ from the following?

  • A.Non-elastic effects
  • B.Gravity
  • C.Power dissipation
  • D.Buoyancy

Answer: A

Rolling friction arises from non-elastic effects.

The wheel and the surface deform slightly at the contact, and the deformation does not recover all its energy as the contact moves on - the hysteresis loss. This is why rolling friction is far smaller than sliding friction, and why hard, well-inflated tyres roll more easily.

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