CBSE Class 11-science Answered
During the circular motion why is the tension zero at the topmost point?
Asked by Rohan Mehra | 12 Mar, 2011, 09:54: PM
Expert Answer
Dear student,
At the topmost point 2 forces are acting on the body. the weight force is acting vertically downwards and the centrifugal force due to its circular force is acting vertically upwards(centrifugal force always acts perpendicular to the velocity of the body.) when the two forces balance each other the tension acting on the body becomes zero. mw^2r = mg( where m= mass of the sphere. w = angular velocity of the sphere . g= accelaration due to gravity. )
Hope this helps.
Thankyou
Team
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Answered by | 12 Mar, 2011, 11:03: PM
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