6. A stone of mass m tied to a string of length L is whirled in a
vertical circle. If the string rcmains just stretched when the
stone is at the top of the circle, the tension in the string when
the stone is at the bottoin of the circle is:
(a) 3 mg
(b) 6 mg
(c) 4 mg
(D) 2 mg
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Answer:
6mg........................ maybe
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