Ineed with my physics homework
a boat moves across a stream. the boat's motor pushes the boat at 8.5 m/s north. the stream has a current
that is 5.8 m/s at 35 degrees s of e. what is the magnitude of the boat's total velocity?
** pay attention to direction.

Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?