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A ball of mass m is tied up with string and rotated along a horizontal circle of radius r. At an instant,

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A ball of mass m is tied up with string and rotated along a horizontal circle of radius r. At an instant, its velocity is v, and tension in string is T, the force required for circular motion is

(a) T - mv2/r

(b) T + mv2/r

(c) mv2/r

(d) zero

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Correct option (c) mv2/r

Explanation :

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