In a vertical circle of radius r, at what point in its path a particle – McqOptions

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1.	In a vertical circle of radius r, at what point in its path a particle has tension equal to zero if it is just able to complete the vertical circle [EAMCET 1994]
A.	Highest point
B.	Lowest point
C.	Any point
D.	At a point horizontally from the centre of circle of radius r
Answer» B. Lowest point

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