The three laws of motion developed by Sir Isaac Newton provide the basis for classical mechanics, and can be applied to every element of the game of baseball. Whether you are pitching, hitting or catching a fly ball, your actions can be explained using Newton's three laws of motion. Having a strong grasp of the laws can therefore help you to improve aspects of your game.
Newton's First Law of Motion - Objects at Rest
Newton's first law states that if an object is at rest, it will remain at rest unless an external force is applied. When you are pitching, for example, the ball is at rest when in your hand. In order for you to change the baseball's state of rest, you must supply an external force to throw the ball toward the batter. In order to throw a powerful pitch, you must work to generate force with not only your legs but also your trunk, shoulder, elbow and even your fingers as you hurl the ball.
Newton's First Law of Motion - Objects in Uniform Motion
Newton's first law also goes on to say that an object moving in uniform motion at a constant velocity will remain in its state of motion unless an external force is applied, MIT explains. When a fly ball is falling toward the ground, for example, two forces are acting on it: The force of gravity causes it to accelerate downward, while air resistance causes it to decelerate, or accelerate upward. When these two forces are equal they cancel each other out, and the ball travels in a state of uniform motion at a constant velocity, according to the National Aeronautics and Space Administration. When you attempt to to snag the fly ball, you must exert an external force on the ball with your mitt; this causes the ball to go from moving at a constant velocity to being at rest, effectively changing its state of motion and allowing you to successfully make the catch.
Newton's Second Law of Motion - Force and Acceleration
The second law of motion dictates that the applied force on an object is a product of its mass and its acceleration. Assuming the mass of a baseball is constant, this law provides a crucial bit of information: The greater the force you apply to a baseball, the greater its acceleration. For this reason, when you attempt to pitch a fastball it is beneficial to maximize your applied force when throwing the ball. When pitching, you should reach your hand as far back as possible to wind up, and you should release the ball while moving as far forward as possible to maximize the force you apply to the ball and maximize its speed.
Newton's Third Law of Motion - Action and Reaction
The third law of motion states that for every action, there is an equal and opposite reaction. For example, when catching a baseball, the ball exerts a force on your mitt that causes your hand to move backward. The reaction to this is that the mitt exerts an equal and opposite force on the baseball, which causes the ball to move forward. This is why it is very important to close your mitt around a baseball when catching it; if you don't, the force exerted by the mitt on the ball will cause it to bounce right out of your glove.
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