Una persona, en trayectoria rectilínea, camina 1 min a 1,26 m/s y después corre durante 1 min a 3,05 m/s. calcule la rapidez media de todo el recorrido.

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.

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) =_