A particle of mass `m` attached to a string of length `l` is descending circular motion on a smooth plane inclined at an angle `

A particle of mass `m` attached to a string of length `l` is descending circular motion on a smooth plane inclined at an angle `alpha` with the horizontal. For the particle to reach the highest point its velocity at the lowest point should exceed.
A. `sqrt(5gl)`
B. `sqrt(5gl(cos alpha+1))`
C. `sqrt(5gl//tan alpha)`
D. `sqrt(5gl sin alpha)`

A particle of mass `m` attached to a string of length `l` is descending circular motion on a smooth plane inclined at an angle `alpha` with the horizo

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