Michael+Greenwood

=__Physics of Playing Baseball __=

Albert Pujols


 * Friction** - Is a force that resists an object from moving freely on another object. The force happens in an opposite direction of the other object. The more friction you have the harder it is for the object to move. In this example the batting gloves and the bat are the two forces acting on each other. The grip of the batting gloves are resisting against the bat so that the batter has more grip on the bat. Thus equaling more friction.




 * Acceleration** - Is defined as an object changing its velocity over time. There is only acceleration when an object is changing its velocity. In this picture, the bat is accelerating once the batter starts his swing until he hits the ball. The acceleration can be measured as Velocity/Time.




 * Speed** - Is a scalar quantity that can be defined as how fast an object is moving. It is the rate of which an object is moving over a distance or how much distance it covers over a period of time. When pitching in baseball, a baseball has a high speed because it covers a short distance (60 feet 6 inches) in a very short amount of time. The speed varies based on the type of pitch that is thrown. But the fastest pitcher in baseball right now can throw a baseball with the speed of 106 miles per hour.

References

http://www.physics4kids.com/files/motion_friction.html http://www.physicsclassroom.com/class/1dkin/u1l1e.cfm http://www.physicsclassroom.com/class/1dkin/u1l1d.cfm