Vertical Circles: Centripetal Force & Tension

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Does the magnitude of centripetal force as well as the tension change in a vertical circle?
 
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The net centripetal force don't change but as the direction of gravity wrt the rotating body change .. tension change

like, T+mg provide centripetal force when body is at highest point but its T-mg at lowest point
 
cupid.callin said:
The net centripetal force don't change but as the direction of gravity wrt the rotating body change .. tension change

like, T+mg provide centripetal force when body is at highest point but its T-mg at lowest point

f=mv^2/r, why does v changee thenn? :confused: