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Discussion

Which of the following statement is incorrect?

  • A.A force acting in the opposite direction to the motion of the body is called force of friction
  • B.The ratio of the limiting friction to the normal reaction is called coefficient of friction
  • C.A machine whose efficiency is 100% is known as an ideal machine
  • D.The velocity ratio of a machine is the ratio of load lifted to the effort applied

Answer: D

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