1.

A `1kg` stone at the end of `1m` long string is whirled in a vertical circle at a constant speed of `4m//s`. The tension in the string is `6N`, when the stone is at `(g=10m//s^(2))`A. top of the circleB. bottom of the circleC. halfway downD. none of these

Answer» Correct Answer - A
At top of the circle
`T=(mv^(2))/(l)-mg`


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