Question

What is Non-conservative force?Give example.

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Answer 1

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A force is said to be non-conservative if the work done by or against the force in moving a body depends upon the path between the initial and final positions. This means that the value of work done is different in different paths.

(i) Frictional forces are non-conservative forces as the work done against friction depends on the length of the path moved by the body.

(ii) The force due to air resistance, viscous force are also non-conservative forces as the work done by or against these forces depends upon the velocity of motion.

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Answer 2

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