Recent content by jlew

Thanks for the replies, I was able to solve this question by taking the ratio of x = Ae^-(b/bm)t. I was making this problem a lot harder than it actually was, mostly because I didn't really understand what the previous formula was solving for. I was originally trying to treat pendulum like a...

[SOLVED] Stuck on damped pendulum question... Homework Statement A pendulum of length 1.00m is released at an angle of 15.0 degrees. After 1000 seconds, it's amplitude is decreased to 5.50 degrees due to friction. What is the value of b/2m? Homework Equations w = \sqrt{w_{0}^{2} -...

Thanks a lot for the quick reply Dick. You're right, I corrected the typo above. If I use mv*dv/dt as the derivative of (1/2)mv^2, and kx*dx/dt as the deriviative of (1/2)kx^2, the solution is very straight forward. I suppose I need to go back in my textbook and see how you derived that...

[SOLVED] Energy of a damped oscillator Homework Statement I simply need to show that the rate of energy for a damped oscillator is given by: dE / dT = -bv^2, where b is the dampening coefficient Homework Equations I am instructed to differentiate the formula: E = 1/2 mv^{2} + 1/2 kx^{2}...