Please see attached. Thanks!© BrainMass Inc. brainmass.com March 4, 2021, 6:03 pm ad1c9bdddf
At the top most point of the ball,
m*g + Tt = m*vt^2/L ...(1)
At the bottom most point,
Tb - m*g = ...
This solution is provided in a two page .pdf file attached. It concludes a diagram of the balls as well as how centrifugal force comes into play in regards to tension in the string.