Answer fast plz no work neeeded to be shown

uestion 8 (2 points) A ball attached to a string is swung in a circular loop in the vertical plane. If the ball is to just swing over the top of the loop, the tension in the string is zero. So, what is the value for its centripetal acceleration at this point? g downward Do.5g downward g upward 2g upward Problems (2 questions - 15 mins) 9:53 AM