A 570 kg elevator accelerates downwards at 1.5 m/s2 for the first 13 m of its motion. Part A
How much work is done during this part of its motion by the cable that lowering the elevator? Neglect any friction or air resistance.

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) =_