A0.150 kg ball on the end of a 1.10 m long cord (negligible mass)is swung in a vertical circle..
(a) what is the minimum speed the ball must have at the top of its arc so that the ball continues moving in a circle?
calculate the tension in the cord at the bottom of the arc assuming the ball is moving at twice the speed of part (a)

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_