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For which of the following does the cent...

For which of the following does the centre of mass lie outside the body ?

A

A pencil

B

A shortcut

C

A disc

D

A bangle

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The correct Answer is:
D
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Knowledge Check

  • there is a rod AB of uniform cross section and its centre is C. In which of the following case(s) centre of mass of the rod may lie at C.

    A
    Density of the material of rod increases continuously from A to B.
    B
    Density of the material of rod increases continuously from B to A.
    C
    Density of the material of rod increases from A to C and then decreases from C to B
    D
    Density of the material of rod decreases from A to C and then increases from C to B.

  • The centre of mass of a body

    A
    depends on the choice of co - ordinate system
    B
    is independent of the choice of co - ordinate system .
    C
    may or may not depend on the choice of co - ordinate system
    D
    None of the above

  • The centre of mass of a body

    A
    Lies always at the geometrical centre
    B
    Lies always inside the body
    C
    Lies always outside the body
    D
    May lie within or outside the body.
    • NARAYNA-SYSTEM OF PARTICLES AND ROTATIONAL MOTION -EXERCISE - IV
    1. For which of the following does the centre of mass lie outside the bod...

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    2. Which of the following points is the likely position of the cent...

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    3. A particle of mass m is moving in yz - plane with a uniform veloci...

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    4. When a disc rotates with uniform angular velocity, which of the follow...

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    5. A uniform square palte has a small piece Q of an irregular shape...

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    6. In the above problem , the CM of the plate is now in the followin...

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    7. The density of a non-uniform rod of length 1m is given by rho (x) = a ...

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    8. A Merry -go-round, made of a ring-like plarfrom of radius R and mass M...

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    9. Choose the correct alternative :

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    10. Figure shows two identical particles 1 and 2 , each of mass m ...

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    11. The net external torque on a system of particles about an axis is zero...

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    12. A uniform cube of mass m and side a is placed on a frictionless ...

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    13. A uniform uniform sphere of mass m and radius R is placed on a ro...

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    14. A T shaped object with dimesions shown in the figure , is lying a...

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    15. A circular ring of mass 6kg and radius a is placed such that its cente...

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    16. In the figure d shown a hole of radius 2 cm is made in a semicir...

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    17. The figure shows the positions and velocities of two particles . ...

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    18. A rod of length 3m and its mass par unit length is directly propo...

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    19. A wheel is rotating about an axis through its centre at 720 rp...

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    20. A particle of mass m describes a circle of radius r . The centripetal ...

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