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A 1kg stone at the end of 1 m long string is whirled in a vertical circle at constant speed

A 1kg stone at the end of 1m long string is whirled in a vertical circle at constant speed of 4 m/s.The tension in the string is 6N, when the stone at (take,g=10 m/s²).

Options

(a) top of the circle
(b) bottom of the circle
(c) half way down
(d) None of the above

Correct Answer:

top of the circle

Explanation:

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