1. The problem statement, all variables and given/known data -A pendulum with a length of 1.00 m is released from an initial angle of 15.0 degrees. After 1,000 seconds, its amplitude is reduced to friction by 5.50 degrees. What is the value of b/2m? 2. Relevant equations In simple harmonic motion, a simple pendulum ---> 2pi times the square root of length over g constant. 3. The attempt at a solution If it is released from an initial angle of 15 degrees, I believe I must do 1sin or cos15 degrees. If friction is involved, I guess I must use the sum of all forces which is tension and friction opposing one another? And what does "b" stand for?