March 7, 2021

The subject ‘Theory of Machines’, also known as ‘Mechanics of Machines’, comprises: (i) the study of the relative motion between the parts of a machine, and (ii) the study of the forces which act on those parts. It is understood that most mechanical engineering activities revolve around a mechanical system whose function depends on the

In an I.C engine, moving parts rub against each other causing frictional force. Due to the frictional force, heat is generated and the engine parts wear easily. Power is also lost due to friction. To reduce the power loss and also wear and tear of the moving parts, a foreign substance called lubricant is introduced