The velocity of desmond’s car changes from 20 meters/second to 10 meters/second. the change happens in 5 seconds. what’s the acceleration of the car? use .

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?