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What happens to the coefficient of frict...

What happens to the coefficient of friction if the weight of the body is doubled ?

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When weight of the body is doubled still then there is no change in coefficient of friction . Because frictional force `oo` normal reaction . So when weight of a body is doubled then frictional force and normal reaction will also becomes doubled and coefficient of friction remains constant .
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Knowledge Check

  • The coefficient of static friction may be

    A
    less than 1
    B
    greater than 1
    C
    equal to 1
    D
    all

  • A body is moving up an inclined plane of angle theta with an initial kinetic energy E. The coefficient of friction between the plane and the body is mu . The work done against friction before the body comes to rest is

    A
    `(mucostheta)/(Ecostheta+sintheta)`
    B
    E
    C
    `(muEcostheta)/(mucostheta+sintheta)`
    D
    `(muEcostheta)/(mucostheta+sintheta)`

  • A body is moving up an inclined plane of angle theta with an initial kinetic energy E. The coefficient of friction between the plane and body is mu. The work done against friction before the body comes to rest is

    A
    `(mu cos theta)/( E cos theta + sin theta)`
    B
    `2 mu E cos theta `
    C
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    D
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