1. The problem statement, all variables and given/known data In a science museum, a 100kg brass pendulum bob swings at the end of a 13.0m -long wire. The pendulum is started at exactly 8:00 a.m. every morning by pulling it 1.7m to the side and releasing it. Because of its compact shape and smooth surface, the pendulum's damping constant is only .010kg/s. At exactly 12:00 noon, how many oscillations will the pendulum have completed? And what is its amplitude? 2. Relevant equations x(t)=Acos(wt) 3. The attempt at a solution I found the number of oscillations was 1990, but I don't know how to calculate the amplitude? The period is 7.237seconds so the frequency is .1382 I can say 0=Acos(.1382*3.6185) but that does not help. how can I solve for amplitude because I do not know the x(t) at any point except that it is 0 at the the lowest point?