A13.0 kg wheel, essentially a thin hoop with radius 1.80 m, is rotating at 469 rev/min. it must be brought to a stop in 16.0 s. (a) how much work must be done to stop it? (b) what is the required average power? give absolute values for both parts.

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?