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Distinguish between centre of mass and c...

Distinguish between centre of mass and centre of gravity .

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Distinguish between the centre of mass and the centre of gravity.

Under what conditions do the centre of mass and centre of gravity of a body coincide.

Knowledge Check

  • (A) : In the uniform gravitational field centre of mass and centre of gravity coincide with each other. Where as in ther case of non - uniform gravitational field they will not coincide with each other. (R ) : Centre of mass is independent of acceleration due to gravity but centre of gravity depends on acceleration due to gravity.

    A
    Both (A) and (R ) are true and (R ) is the correct explanation of (A)
    B
    Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
    C
    (A) is true but (R ) is false
    D
    Both (A) and (R ) are false

  • (A) : In the uniform gravitational field centre of mas and centre of gravity coincide with each other. Where as in the case of non- unifrom gravitational field they will not coincide with each other. (R ) : Centre of mass is independent of acceleration due to gravity but centre of gravity depends on acceleration due to gravity.

    A
    Both 'A' and 'R' and true and 'R' is the correct explantation of 'A'
    B
    Both 'A' and 'R' and true and 'R' is not the correct explantation of 'A'
    C
    A' is true and 'R' is false
    D
    A' is false and 'R' is true

  • {:(,"List - 1",,"List - 2"),((a),"Position of centre of mass",(e ),"is zero"),((b),"the algebraic sum of moments of all the masses about centre of mass",(f),"in non, uniform gravitational field"),((c ),"Centre of mass and centre of gravity coincide",(g),"is independent of frame of reference"),((d),"Centre of mass and centre of gravity do not coincide",(h),"in uniform gravitational field"):}

    A
    a-e, b-g, c-f, d-h
    B
    a-g, b-e, c-f, d-h
    C
    a-g, b-e, c-h, d-f
    D
    a-h, b-e, c-f, d-g

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    Distinguish between face-centred and end-centred unit cells .

    (A) : At the centre of earth, a body has centre of mass but no centre of gravity. (R ) : Acceleration due to gravity is zero at the centre of earth.

    (a) Algebaric sum of moments of masses about centre of mass is zero (b) For small bodies centre of mass coincides with centre of gravity (c ) Position of centre of mass depends on co-ordinate system (d) Position of centre of mass is independent of mass distribution

    (a) Algebraic sum of moments of masses about centre of mass is zero (b) For small bodies centre of mass coincides with centre of gravity (c) Position of centre of mass depends on co-ordinate system (d) Position of centre of mass is independent of mass distribution

    (a) Algebraic sum of moments of masses about cenre of mass is zero (b) For small bodies centre of mass coincides with centre of gravity (c ) Position of centre of mass depends on co-ordinate system (d) Position of centre of mass is independent of mass distribution

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