The fastest pitched baseball was measured at Typically, a baseball has a mass of 145 g. If the pitcher exerted his force (assumed to be horizontal and constant) over a distance of 1.0 m, (a) what force did he produce on the ball during this record-setting pitch? (b) Draw free-body diagrams of the ball during the pitch and just after it left the pitcher's hand.

The same force that gives the standard 1 kg mass an acceleration of 1.00 m/s2 acts first on body A, producing an acceleration of 0.420 m/s2, and then on body B, producing an acceleration of 0.356 m/s2. Find the acceleration produced when A and B are attached and the same force is applied.

As a system's mass increases, its acceleration decreases and approaches 0. Based on Newton's second law, will a system with extremely large mass still have a non zero acceleration?

An American football lineman reasons that it is senselessto try to out-push the opposing player, since no matterhow hard he pushes he will experience an equal andopposite force from the other player. Use Newton’s lawsand draw a free-body diagram of an appropriate systemto explain how he can still out-push the opposition if he isstrong enough.