a football player with a mass of 100 kg from runs from rest toward his opponent and hits him with a force of 500 Newtons 5 seconds later what was his momentum before impact

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 3.00 ms . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?