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A small hevy block is attached to the lo...

A small hevy block is attached to the lower4 end of a light rod of lenth l which fan be rotated about its clamped upper end. What minimum horizontal velocity should the block be given so that it moves in a complete vertical circle ?

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The correct Answer is:
B
Let the velocity of the body at AL is for minimum velocity given ta velocity of the body at point B is zero.


Applying law of conservation of energy at A and B
`1/2 mv^2=mgh`
`1/2mv^2=mg(2L)`
`rarr v=sqrt((4gL))=2sqrt(gL)`
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HC VERMA-WORK AND ENERGY-Exercises
  1. Consider the situation shown in figure. Initially the spring is unstre...

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  2. A block of mass m is attached to two unstretched springs of spring con...

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  3. A block of mass m sliding n a smooth horizontal surface with velocity...

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  4. A small block of mass 100 g is pressed against a horizontal spring fix...

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  5. A small hevy block is attached to the lower4 end of a light rod of len...

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  6. Figure shows two block A and B, each having a mass of 320 g connected ...

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  7. one end of a spring of natural length h and spring constant k is fixed...

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  8. Figure shows a light rod of length l rigidly attached to a small heavy...

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  9. The bob of a pendulum at rest is given a sharp hit to impart a horizon...

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  10. A simple pendulum consists of a 50 cm long string connected to a 100 g...

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  11. Figure shows a smooth track, a part of which is a circle of radius R. ...

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  12. The bob of a stationary pendulum is given a sharp hit to impart it a h...

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  13. A heavy particle is usspended by a 1.5 m long string . It is given a h...

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  14. A simple pendulum of length L having a bob of mass m is deflected from...

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  15. A particle slides on the surface of a fixed smooth sphere starting fro...

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  16. A particle of mass m is kept on a fixed, smooth sphere of radius R at ...

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  17. A particle of mass m is kept on the top of a smooth sphere of radius R...

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  18. Figure shows a smooth track which consists of a straight inclined part...

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  19. AS chain of length l and mass m lies o the surface of a smooth sphere ...

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  20. A smooth sphere of radius R is made to translate line with a constant ...

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