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In the figure of problem 17 if the block...

In the figure of problem 17 if the block starts from rest when `R = 5r`, what is the reaction of the inner track on the sliding mass at the highest point ? From what height should it fall so that it may exert a force equal to its weight on the track at the highesth point ?

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The correct Answer is:
5 mg, 3r
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NN GHOSH-CENTRIPITAL AND CENTRIFUGAL FORCES-Exercises (B)
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  2. In problem 17 if the mass m is allowed to fall from a height 2R, find ...

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  3. In the figure of problem 17 if the block starts from rest when R = 5r,...

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  7. A simple pendulum consists of a heavy mass supported by a light, thin ...

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  11. A body is suspended by a string of length 1 m and is projected horizon...

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  12. A mass of 0.675 kg on a frictionless table is attached to a string whi...

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  13. A particle is placed inside a hemispherical bowl which rotates about i...

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  14. A rigid rod of length l but of negligible mass has heavy mass m attach...

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  15. Suppose that the string of a simple pendulum is elastic and k is its f...

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  16. A rod of length l rotates with uniform velocity omega about an axis pe...

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  17. A small body is placed on the top of a smooth sphere of radius R. Then...

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  18. A particle mass m begins to slide down a fixed smooth sphere from the ...

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  19. A particle of mass m is suspended by a string of length l from a fixed...

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  20. A man stands on a running train (speed 60 kmph) with his feet 60 m apa...

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