Sir Isaac Newton developed three laws that describe what causes an object to move after coming into contact with another object, such as when you hit a softball with your bat. Newton's Three Laws of Motion can be used to understand why the softball moves, and even help improve your softball game.
The First Law of Motion
If a softball is moving at a constant velocity, it will continue to move at that velocity until an external force acts on it, according to Newton. Assuming air resistance is negligible, a softball is moving at a constant velocity after being pitched at the batter. The only way the ball can change velocity and move in the opposite direction, toward the outfield fence, is if an external force is applied. The bat acts as this external force when it makes contact with the ball.
The Second Law of Motion
According to Newton, the acceleration of a softball is directly proportional to the force applied to it, assuming its mass remains constant. This explains why the harder you hit the softball with your bat, the faster it accelerates toward the outfield. A more powerful swing exerts more force on the ball, causing it to accelerate more and reach a higher velocity after being hit by the bat. You can increase the force of your swing by using a heavier bat.
The Third Law of Motion
When two objects come in contact they exert an equal and opposite force on each other, according to Newton. When you hit a softball, your bat exerts a force on the ball that causes it to move, and the ball exerts an equal force on the bat in the opposite direction. For this reason, it is important to grip the bat firmly when swinging at the ball. If you don't, the force exerted by the ball on the bat can cause you to lose your grip.
Considerations
When playing softball, follow-through with the bat when hitting the ball because that will increase the time of collision between the bat and the ball. The bat will exert force on the ball over a longer period, causing the ball to have an increased velocity and move faster after being hit, according to The Physics Classroom.
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