1. The problem statement, all variables and given/known data You swing a marble with mass m attached to the end of a string in a horizontal circle as shown in the figure below. The angle that the string makes with the vertical is θ = 37°. (a) Find the speed of the marble when the string is 26.0 cm long. 2. Relevant equations soh,cah,toa Ar = v^2/r 4ii^2r/T 3. The attempt at a solution I solved for the radius by using trig, but now I don't know what to do. Without mass or revloutions, I don't know how to solve form the speed.