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Tension at the lowest point of a vertical circle at a given number of revolutions per minute

The same question, asked 2 times: 19 Apr 2026 S2*, 14 May 2026 S2. Every wording below, oldest first.

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  1. Question 1

    19 Apr 2026 S2

    104
    A stone of mass 4040 g is tied to a light inextensible string of length 5050 cm and whirled in a vertical circle at the rate of 3030 revolutions per minute. The tension in the string when it is at the lowest point of the circle is (Take gravitational acceleration, g=10 m/s2g = 10\ \mathrm{m/s^2} and π2=10\pi^2 = 10)

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  2. Question 2

    14 May 2026 S2

    104
    A stone of mass m is tied to a string and is moved in a vertical circle of radius r making 'n' r.p.m. The total tension in the string when the stone is at the lowest point is (gg = acceleration due to gravity)

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