Apendulum with an arm length of 28 cm is pulled back to a maximum angle of 40 degrees. attached to this pendulum arm is a bob of mass 2 kg. assuming negligible friction in the system, fine (a) the gravitational potential energy of the bob initially, the kinetic energy of the bob initially, the total energy of the bob initially, and the work done by non-conservative forces (if any). (b) find the gravitational potential energy and the kinetic energy of the bob as it swings through its lowest point. (c) calculate the speed of the bob when it is moving the fastest. (d) to what height (measured upwards from its lowest point) does the bob reach before coming to rest?
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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) =_
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Apendulum with an arm length of 28 cm is pulled back to a maximum angle of 40 degrees. attached to t...
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