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Define centre of gravity....

Define centre of gravity.

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The centre of gravity

Define the centre of gravity of a homogenous rigid body.

A : If an object is taken to the centre of earth, then its centre of gravity cannot be defined. R : At the centre of earth acceleration due to gravity is zero.

Under which condition (i) the centre of buoyancy coincides with the center of gravity (ii) the centre of bouyancy does not coincide with the centre of gravity.

For a circular ring, centre of gravity lies

Explain what is meant by centre of gravity.

Assertion : At the centre of earth, a body has centre of mass , but no centre of gravity. Reason : This is because g = 0 at the centre of earth.

SL ARORA-System of particles & rotational Motion-EXERCISE
  1. Mass remaining constant, if the earth suddenly contracts to one third ...

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  2. What are the differences between internal and external sources of recr...

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  3. Define centre of gravity.

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  4. The centre of mass of a system of particle is at the origin the number...

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  5. Give an expression for the velocity and acceleration of the centre of ...

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  6. Assertion : If there is no external torque on a body about its centre ...

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  7. Statement-1 : Total linear momentum of system in centre of mass frame ...

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  8. What will be the total linear momentum of a system of particles in a r...

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  9. A double star is a system of two stars of masses m and 2m, rotating ab...

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  10. Centre of mass of the earth-moon system lies

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  11. On what factors does the position of cm of a rigid body depend ?

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  12. Define moment of force or torque.

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  13. State the principle of moments.

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  14. Angular momentum is

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  15. The relation between the torque tau and angular momentum L of a body o...

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  16. Starting from the definition of angular momentum in terms of position ...

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  17. The radius of gyration of a body depends upon

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  18. On what factors does the radius of gyration of a body depend ?

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  19. State theorem of parallel axes and therom of perpendi cular axes about...

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  20. State and prove theorem of perpendicular axes.

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