1.

A particle crosses the topmost point C of a vertical circle with critical speed , then the ratio of velocities at points A, B and C is A. `3 : 2 : 1`B. 5 : 3 : 1`C. `5^(2) : 3^(2) : 1^(2)`D. `sqrt(5) : sqrt(3) : sqrt(1)`

Answer» [4]
`v_(e)=sqrt(g)R,v_(A)=sqrt(5)gR,v_(n)=sqrt(3)gR`
`v_(A) :v_(B):v_(C ) : :sqrt(5): sqrt(3):1`


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