A 1-kg ball moving at 3m/s strikes a 2-kg ball and stops. if the 2-kg ball is initially at rest, find its speed after the collision.

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

A58-kg boy swings a baseball bat, which causes a 0.140-kg baseball to move toward third base with a velocity of 38.0 m/s.

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) =_