A 1 kg stone at the end of 1 m long string is whirled in a vertical circle at constant speed of 4 m s - 1 . The tension in the string is 6 N when the stone is at ( g = 10 m s - 2 )

Question

A 1 kg stone at the end of 1 m long string is whirled in a vertical circle at constant speed of 4 m s - 1 . The tension in the string is 6 N when the stone is at ( g = 10 m s - 2 ), Top of the circle, Bottom of the circle, Half way down, None of the above

MARKS App · Accepted Answer

Tension at top point T + mg = mu 2 r ∴ T = 1 × 4 2 1 - 1 × 1 0 = 6 N

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