Work done by various forces, Potential and kinetic energy. Conservative and non conservative forces

Concept of conservative and non conservative force

Potential Energy || Conservative and Non-conservative Forces

Is friction a non-conservative force?

Can you associate potential energy with a non conservative force ?

Friction is non-conservative force. How ?

A force is said to be conservative if work done by or agains the force depends only on initial and final positions of the body and not on the nature of path followed. A force is said to be non-conservative, if work done by or against the force in moving a body from one position to another, depeds on the path followed between these two positions. Potential energy is defined only for conservative forces. It does not exist for non-conservative forces. Read the above passage and answer the following question : (i) Give two examples, each for conservative and non-conservative forces. (ii) Potential energy does not exist for non-conservative forces. What does it imply ini day to day life ?

Match the following : {:(,"Column-I",," Column-II"),("(A)","Work done by all the forces",,"(P)Change in potential energy"),("(B)","Work done by conservative forces",,"(Q) Change in kinetic energy"),("(C)","Work done by external forces",,"(R) Change in mechanical energy"),(,,,"(S) None"):}

A : Work done by the frictional force can’t be positive. R : Frictional force is a conservative force.