A child revolves a stone of mass 0.5 kg tied to the end of a string of length 40 cm in a vertical circle. the speed of the stone at the lowest point of the circle is 3m/s. Calculate the tension in the string at this point.
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A child revolves a stone of mass 0.5 kg tied to a string of length in a vertical circle, the speed at the lowest point is 3 m/s. The tension at the lowest point is 16.155 N.
1) when a stone is rotated in a vertical circle the string experiences tension at the lowest point.
2) This is due to the fact that centrifugal force and the weight acts downwards due to gravity.
3) so net tension T = centrifugal force + weight
4) Centrifugal force = m * v^2 / r = (0.5 * 3^2) / 0.4 = 11.25 N
5) weight = m * g = 0.5 * 9.81 = 4.905 N
6) Tension = 16.155 N
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