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Can centre of mass of a body lie where t...

Can centre of mass of a body lie where there is absolutely no mass ?

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Yes, it can. For example, centre of mass of a uniform circular ring lies at the centre of the ring, where there is no mass.
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Statement-1 : The centre of mass of a body may lie where there is no mass. Statement-2 : The centre of mass has nothing to do with the mass.

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Can mass of a body ever be zero?

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PRADEEP-SYSTEMS OF PARTICLES AND ROTATIONAL MOTION-VERY SHORT ANSWER QUESTIONS
  1. If one of the particles is heavier than mass other, to which side will...

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  2. Does centre of mass of a system of two particles lie on the line joini...

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  3. Can centre of mass of a body lie where there is absolutely no mass ?

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  4. Can centre of mass of a body coincide with geometrical centre of the ...

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  5. Does centre of mass of a rigid body lie always on the body ?

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

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  7. Find the centre of mass of a uniform triangula lamina.

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  8. Determine the coordinates of the centre of mass of a right circular so...

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  9. What is nature of motion of cm of an isolated system ?

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  10. Find the centre of mass of a uniform triangula lamina.

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  11. What is an isolated system ?

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  12. Name the rotational analouge of force. What ar its units ?

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  13. Write an expression for torque. Which rule is used for finding its dir...

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  14. Write the dimensional formula of angular momentum. Is it scalar or vec...

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  15. Name the physical quantity whose dimensions are same as that of angula...

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  16. Which physical quantity is conserved when a planet revolves around the...

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  17. What is angular velocity of earth spinning around its own axis ?

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  18. Moment of inertia of a hollow cylinder of mass M and radius R, about t...

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  19. What is moment of inertia of a solid cylinder of mass m, length l and ...

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  20. What is radius of gyration of a soild sphere of mass m and radius r ab...

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