1. The problem statement, all variables and given/known data A 0.150-kg ball on the end of a 1.10-m-long cord (negligible mass) is swung in a vertical circle. 2. Relevant equations Total net force = mass*centripetal acceleration = mass*(velocity squared)/radius 3. The attempt at a solution The question I have is that... I'm looking at the book Physics Volume I, 6th Edition...And for the radius, shouldn't it be 1.10m/2 to get the radius? On the book, they just have 1.10m for r...So I'm confused here since I thought 1.10 is the diameter of the cord, not the radius. Could someone clarify that?