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A charged body is suspended from a fixed point which has same charge in opposite magnitude using a 1m long string. The body can move in a circular path in the vertical plane. What minimum initial velocity must the body have to complete the full circle around the point of suspension? I am not able to apply work-energy theorem or energy conservation. Also, no condition is defined - you cannot assume tension at any point to be 0 because the body is in circular motion for the entire period, so tension must figure in the calculations for centripetal force.

A charged body is suspended from a fixed point which has same charge in opposite magnitude using a 1m long string. The body can move in a circular path in the vertical plane. What minimum initial velocity must the body have to complete the full circle around the point of suspension? 


I am not able to apply work-energy theorem or energy conservation. Also, no condition is defined - you cannot assume tension at any point to be 0 because the body is in circular motion for the entire period, so tension must figure in the calculations for centripetal force.

Grade:

1 Answers

Sher Mohammad IIT Delhi
askIITians Faculty 174 Points
7 years ago
Yes, the tension in string will balance the gravitational force componet, you cant assume that tension force is zero.

sher mohammad
faculty askiitians
b.tech, iit delhi

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