object of mass 0.20 kg tied to a string is made to move in a vertical circle. When the object is at the highest point, the tension in the string is zero. Determine the tension in the string when the object is at the lowest point. [11.8 N]
The Attempt at a Solution
i tried it and could not arrive at the state answer in bracket. at highest point, weight + tension gives the centripetal force. since tension is said to be zero, at the hioghest point, weight = centripetal force.
then at lowest point, tension - weight gives centripetal. tension is the sum of centripetal and weight = 2 x weight since centripetal was calculated to be equal to weight. but this is not the answer given.
am i missing something?