A stone of mass 0 . 3 kg attached to a 1 . 5 m long string is whirled around in a horizontal circle at a speed of 6 m / s . The tension in the string is

Question

A stone of mass 0 . 3 kg attached to a 1 . 5 m long string is whirled around in a horizontal circle at a speed of 6 m / s . The tension in the string is, 10 N, 20 N, 7.2 N, None of these

MARKS App · Accepted Answer

The force of tension in the string provides required centripetal force to keep the stone in circular motion. ∴ T = m υ 2 R = 0.3 × 6 2 1.5 = 7.2 N

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