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What are conservative and non-conservative forces in Chapter 5 Work, Energy and Power?

0 14 Views | Posted 5 months ago
Asked by Shiksha User

  • 1 Answer

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    Answered by

    Pallavi Pathak | Contributor-Level 10

    5 months ago

    Conservative forces (like gravity or spring force) conserve mechanical energy and do not depend on the path taken. The work done by the conservative forces is recoverable.
    Non-conservative forces (like friction or air resistance) dissipate energy as heat or sound. It depends on the path. When non-conservative forces act, mechanical energy is not conserved.

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Potential energy function corresponding to conservative force is given as  U ( x ,   y ,   z ) = 3 x 2 2 + 5 y + 6 z , then the force at x = 6 is pN. The value of p upto its nearest integral value is
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  F x = − d v d x           

  F → = − 3 x i ^ − 5 j ^ − 6 k ^          

  | F → | x = 6 = 1 8 2 + 5 2 + 6 2          

= 3 2 4 + 2 5 + 3 6

= 3 8 5    

= 19.62N

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