A body of mass ' m ' attached at the end of a string is just completing the loop in a vertical circle. The apparent weight of the body at the lowest point in its path is ( g = gravitational acceleration)

Step-by-step solution

The tension at the lowest point is T = mv ^2 r + mg To complete the vertical circle, the minimum velocity should be v = 5 gr aligned T & = m ( 5 gr )^2 r + mg R & =5 mg + mg T & =6 mg aligned