1. The problem statement, all variables and given/known data A mass M is suspended from a spring and oscillates with a period of 0.820s. Each complete oscillation results in an amplitude reduction of a factor of 0.985 due to a small velocity dependent frictional effect. Calculate the time it takes for the total energy of the oscillator to decrease to 0.500 of its initial value. 2. Relevant equations 3. The attempt at a solution Tried .985^t = .5, then t = log(.5)/log(.985) but this didn't work... any other suggestions?