engineering recuitment BHEL Engineer Trainee Mock Test 2025 Engineering Mechanics Equilibrium and Friction Friction
Which of the following statement is incorrect.
1
Force acting in the opposite direction to the motion of the body is called force of friction
2
The ratio of the limiting friction to the normal reaction is called coefficient of friction
3
A machine whose efficiency is 100% is known as an ideal machine
4
The velocity ratio of a machine is the ratio of load lifted to the effort applied