Engineering :: Engineering Mechanics

@ : Home > Civil Engineering > Engineering Mechanics

Which of the following statement is wrong?

[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: Option D