Download Physics of Baseball & Softball by Rod Cross PDF

By Rod Cross

This booklet describes the physics of baseball and softball, assuming that the reader has a historical past in either physics and arithmetic on the highschool point. The physics is defined in a conversational type, and illustrated with experimental effects bought either within the laboratory and within the box. basic equations also are utilized in order to version the experimental effects and to check even if the reasons are literally legitimate. the subject material presents a superb chance to provide an explanation for physics in an engaging demeanour, given the common approval for baseball and softball as pursuits. there's additionally the interplay among a bat and ball, that's a vintage challenge in physics regarding huge forces, little while periods, momentum, and effort move, vibration, rotation, and different actual houses of the wooden (or aluminum) of the bat, and the ball. The flight of the ball during the air is one other interesting instance of physics in motion, regarding the consequences of gravity, air resistance and ball spin at the ball trajectory. For these readers who already be aware of quite a lot of physics and who're ok with mathematical equations, extra fabric is equipped within the appendices. The booklet additionally describes many easy tasks for readers who desire to practice their very own experiments, if it is for enjoyable, for a college undertaking, or both.

Advance compliment for The Physics of Baseball & Softball

“…so compelling that I learn each web page. Rod has compiled a superb number of perception and discovery to the game...I imagine it might be a superb reference e-book for a physics instructor to counterpoint lectures or clarify topics.”

-Prof. Lloyd Smith, tuition of Mechanical and fabrics Engineering, Washington kingdom University

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Sample text

About half of them use string dampeners to change the ping to a thud, and the other half don’t, depending on what they are accustomed to hearing. It makes no difference to the performance of the racquet, but if the shot sounds “wrong” then it won’t “feel” right. However, bats that ping generally perform better than bats that crack, for reasons that we will explore later. From a physics point of view, the performance of a bat depends only on its physical properties, the five most important being the length, diameter, weight, weight distribution, and stiffness.

A light ball will decelerate rapidly, while a heavy ball will decelerate at a smaller rate. For two balls to travel the same distance, the ratio of their cross-sectional area to their mass must be the same. That is why, in Fig. 1, a ball of mass 50 g and diameter 50 mm travels essentially the same distance as a softball of mass 185 g and diameter 97 mm. The softball is larger in diameter by a factor of 97=50 D 1:94, larger in area by a factor of 1:942 D 3:76 and larger in mass by a factor of 185=50 D 3:70.

1 raise an interesting question concerning the hardness of baseballs and softballs. The question is, why use a very hard ball when a soft ball might do the same job and would be safer? For example, a tennis ball of mass 57 g and 40 3 Ball Trajectories diameter 65 mm struck at 100 mph will travel about the same distance as a softball, and it will do less damage to a player if the player is struck in the head or chest by the ball. The force on the player will be about 12 times smaller. Similarly, a rubber ball similar to a tennis ball but somewhat larger and heavier, and relatively soft if it is hollow, could be used as a safer version of a conventional baseball or softball.

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