The Science of Spin: Spin on Baseball

The direction of baseball after hitting the ball is caused by the rotation of the ball. Rotation is defined as rotation about the baseball axis. The major league pitcher has decided the pitch at 1500 rpm so when the baseball golf ball turns in the air, the line above the ball creates a homemade "airbag" that changes direction. This is called Magnus effect. Baseball rotation is defined as a vector that points to the rotation of the axis. The magnitude of the spin vector is the number of revolutions per second per second, which is called the angular velocity vector (Horney, A., Lowry, T., Schwenker, E., & wray, E.

Currently the fastest spin speed is faster than the one seen with the MLB pitcher, but the focus does not change. Baseball is a millimeter game that makes good contacts and prevents. Therefore, it may be more effective if you can keep a fast rotating ball away from the average. Since it is known that the speed of the separator is considerably slower than the speed of the fastball, it can be thought that the grip of the separator (the index finger and the middle finger are very scattered on the ball) causes a reduction in rotation speed . We have not officially tested this theory, but our preliminary tests agree that an increase in distance between the fingers results in a reduction in rotation speed.

In baseball games, pitchers can control the rotation of the ball more than any other sports. The pitcher can spin the ball according to the pitch you want to pitch, increase the top, back or side spin. The difficulty of throwing each pitch depends on the rotation. As the difficulty increases, the error range narrows. The first ball is the ball that is easiest to pitch as it is affected only a little by the power of Magnus. 4 The slit's fast ball is the main pitch of the pitcher and is thrown most frequently. When the ball is released, it naturally tends to manipulate the ball. The rear spin causes Magnus's power to face upward, dropping the ball later than other coats, causing the illusion that the ball is going up. Other high speed balls such as double seams and cutters rotate, but because the movement is too fast, the position does not change significantly due to Magnus effect.