1. The problem statement, all variables and given/known data a .30kg ball attached to the end of a string swings in a vertical circle having a radius of 1.4m. At the instant when the string makes an angle of 30° above the horizontal, the tension in the string is 3N. What is the speed of the ball at this instant? 2. Relevant equations Can anyone help me with this one? 3. The attempt at a solution T-mgcos30°=m(v2/r) then solve for velocity? Am i doing this right?