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What is the difference between centre of...

What is the difference between centre of mass and centre of gravity?

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A, C, D
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Define centre of gravity.

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Knowledge Check

  • The centre of mass

    A
    coincides always with the geometrical centre of the body.
    B
    always lies on a given body.
    C
    of two-particle system always lies on the line joining two particles.
    D
    is the average of the position vectors of all the

  • The centre of gravity

    A
    is the point where gravitational torque is zero
    B
    is the point where weight of a body acts.
    C
    coincides with centre of mass for same acceleration due to gravity for all particles.
    D
    all of above are correct

  • Assertion: Centre of mass of a rigid body always liees inside the body. Reason: Centre of mass and centre of gravity coincide if gravity is uniform.

    A
    (a) If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.
    B
    (b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
    C
    (c) If Assertion is true, but the Reason is false.
    D
    (d) If Assertion is false but the Reason is true.

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