00:01
In this question we will learn about some basic concept of conservative force, right? the question is which one of the following is not a conservative force? so there are options given like gravitational force, electrostatic force, or the force of friction.
00:17
So to solve this question we should be clear with the definition of conservative force and non -conservative force.
00:26
Right? so a conservative force is a force with the property that the root work done in moving a particle between two points is independent of the part that is taken.
00:39
So equivalently, if a particle travels in a closed loop, that is the initial and the final point are same, then the total work done by the conservative force would be equal to zero, right? for example, electro -static force or the gravitational force.
01:06
So the force, the work done by these forces is independent.
01:10
Of the part.
01:20
So the work then depends only on the initial and final positions, right? but on the other hand, the force of the friction is not a conservative force because when a body is moving in this direction, the force of friction acts in this direction, right? so the work done is done.
01:41
So the work is done against the friction, right? so now let's say the body has moved from a to b...