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What do you mean by centre of mass of a ...

What do you mean by centre of mass of a system? How it differs from the centre of gravity?

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Knowledge Check

  • The centre of mass of a system of particles does not depend on

    A
    Masses of the particles
    B
    Forces on the particles,
    C
    Position of the particles
    D
    Relative distance between the particles.

  • The centre of mass of a system of particles does not depend on

    A
    masses of the particles
    B
    forces acting on the particles
    C
    position of the particles
    D
    relative distances between the particles
    • MODERN PUBLICATION-SYSTEMS OF PARTICLES AND ROTATIONAL MOTION-REVISION EXERCISES (Short Answer Questions Carrying 2 or 3 marks)
    1. What do you mean by centre of mass of a system? How it differs from th...

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    2. Show that centre of mass of an isolated system moves with a uniform ve...

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    3. What are binary stars? Describe their motion in terms of centre of mas...

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    4. A fire cracker following a parabolic path explodes in mid air. The cen...

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    5. What are the factors on which centre of mass of a system depends?

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    6. Show that the angular momentum of a particle is equal to twice the pro...

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    7. Prove that the rate of change of angular momentum is equal to torque a...

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    8. Why are doors provided with handles near the outer edges, far away fro...

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    9. We cannot open or close the door by applying force at the hinges. Why?

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    10. Why it is more difficult to revolve a stone by tying it to a longer st...

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    11. Distinguish between stable, unstable and neutral equilibrium of a body

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    12. What are the factors on which moment of inertia of a body depend ?

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    13. What is radius of gyration? Derive an expression for the radius of gyr...

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    14. Establish a relation between angular momentum and moment of inertia of...

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    15. Establish a relation between angular momentum and moment of inertia of...

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    16. State and explain parallel axis theorem and perpendicular axis theorem...

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    17. Derive the relation between kinetic energy and moment of inertia of a ...

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    18. What will happen to the duration of the day if the ice on polar caps o...

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    19. How will you distinguish between a hard boiled egg and a raw egg by s...

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    20. If earth were to shrink suddenly, what would happen to the length of t...

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