InterviewSolution
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InterviewSolution
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A main revolves a stone of mass `m` tied to the end of a string in a circle of radius R The net force at the lowest and beight point of the circle directed vertical downward are Here`T_(1),T_(2)` and `(v_(1),v_(2))` denote the tension in the string (and the speed of the stone) at the lowest and highest points, respectively.A. `mg-T_(1)` and `mg+T_(2)`B. `mg+T_(1)` and `mg-T_(2)`C. `mg+T_(1)-((mv_(1)^(2))/(R))` and `mg-T_(2)+((mv_(2)^(2))/(R))`D. `mg-T_(1)-((mv_(1)^(2))/(R))` and `mg+T_(2)+((mv_(2)^(2))/(R))` |
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Answer» Correct Answer - A At the lowest point, mg acts downwards and `T_(1)` upwards so that net force `=mg-T_(1)` . At the highest point, both mg and `T`, act downwards so that net force `=mg+T_(2)` . Hence, option (a) is correct. |
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