1. The problem statement, all variables and given/known data A pendulum traveling at constant speed along a circular path Determine the angle that the string makes with the vertical. The length of the string was measured to be 60 cm. The period was measured to be 1.41 s The frequency was found to be 0.709 2. Relevant equations Is it possible to find the radius with only the Period T and frequency f? 3. The attempt at a solution I believe that it should be possible to use the period and frequency to find the velocity, and from there the radius. Once I have the radius, I can find the angle. Using: v = 2(pi)r / T, v = 2 (pi)fr, v = (2 x pi x radius)/period, v = 2 x pi x frequency x radius a = v^2/r = (2(pi)f)^2r =(2(pi)/T)^2 r a = velocity squared / radius = (2 x pi x frequency) squared x radius = ((2 x pi) / T))squared x radius I have tried solving for "r" and substituting the solution in order to find velocity, .... but I end up circling back the an equation with both the two unknown variables that I am trying to find, v and r. with advanced thanks for any advise, D.T.