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Write an expression for torque. Which ru...

Write an expression for torque. Which rule is used for finding its direction ?

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`overset rarr(tau) = overset rarr(r ) xx overset rarr(F)`. The direction of `overset rarr(tau)` is given by right handed screw rule.
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PRADEEP-SYSTEMS OF PARTICLES AND ROTATIONAL MOTION-VERY SHORT ANSWER QUESTIONS
  1. What is an isolated system ?

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

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

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

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

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

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

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

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

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

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

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  12. A ring and a circular disc of different materials have equal masses an...

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  13. A disc of metal is melted and recast in the from of a soild sphere. Wh...

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  14. What are the units and dimensions of moment of inertia ? Is it a vecto...

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  15. What is rotational analogure of mass of a body ?

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  16. State the two theorems of moment of inertia.

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  17. What is moment of inertia of a solid sphere about its diameter ?

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  18. What is the moment of inertia of a hollow sphere about an axis passing...

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

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  20. Is radius of gyration of a body constant quantity ?

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