what are central and conservative forces?
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Central Forces:
A central force is a force (possibly negative) that points from the particle directly towards a fixed point in space, the center, and whose magnitude only depends on the distance of the object to the center.
E.g: Gravitational force, Coulomb force, etc.
Conservative Forces:
A conservative force is a force with the property that the total work done in moving a particle between two points is independent of the taken path. Equivalently, if a particle travels in a closed loop, the net work done (the sum of the force acting along the path multiplied by the displacement) by a conservative force is zero.
E.g: Force in elastic spring, electrostatic force between two electric charges,etc.
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