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A heavy mass is attached to a thin wire ...

A heavy mass is attached to a thin wire and is whirled in a vertical circle. The wire is most likely to break

A

when the mass is ast the highest point

B

when the mass is ast the lowest point

C

when the wire is horizontal

D

at an angle of `cos^-1(1/3)` from the upward vertical.

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HC VERMA-SOME MECHANICAL PROPERTIES OF MATTER-Objective 1
  1. When metal wire is stretched by a load the fectional change in its vol...

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  2. The length of a metal wire is l1 when the tensionin it is T1 and is l2...

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  3. A heavy mass is attached to a thin wire and is whirled in a vertical c...

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  4. When a metal wire elongates by hanging a load on it, the gravitational...

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  5. By a surface of a liquid we mean

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  6. An ice cubeis suspended in a vacuum in gravity free hall. As the ice ...

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  7. When water droplets merge to form a bigger drop

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  8. The dimension ML^-1T2 can correspond to

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  9. Air is pushed inot a soap bubble of radius r to duble its radius. If t...

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  10. If more aire is pushed in a soap bubble the pressure in it

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  11. If two soap bubbles of different radii are connected by a tube

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  12. Figure shows a capillary tube of radius r dipped into water. If the a...

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  13. The excess pressure inside a soap bubble is twice the excess pressurre...

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  14. Which of the following graphs may represent the relation between the c...

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  15. Water rises in a vertical capillary tube up to a length of 10 cm. If t...

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  16. A 20 cm long capillary tube is dipped in water. The water rises up to ...

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  17. Viscosity si property of

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  18. The force of viscosity is

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  19. The viscous force acting between two layers of a liquid is given by F/...

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  20. A raindrop fasllls near the surface of the earth with almost uniform v...

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