1. A trolley A of mass 1.0 kg is moving at 2.0 m/s. It collides with a stationary trolley B of mass 2.0 kg. Trolley B moves off at 1.2 m/s
[Use the principle of conservation of momentum to calculate the speed of the trolley A after the collision
and state of its direction.]

Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.

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) =_

The solid that is formed and usually sinks to the bottom of a solution is the