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This work describes the golf shot as a collision of the blade of the golf club with the golf ball. Owing to the fact that the collision occurs in a fraction of a second, the shaft is irrelevant, and the problem can be reduced to that of the collision of the ball with just the blade. (By analogy, the collision of the golf ball and a single brick is almost identical to the collsion of the same golf ball with an entire brick wall.) Newton's Laws are used to compute the force delivered during the collision. More complex mathematics is also given in the book. It examines such matters as the rolling of the ball, and the execution of the golf swing as a hinged pendulum. This book has some information of interest to soccer physics. For instance, at a speed of 30 m/sec, the Reynold's Number of an 8.7 inch diameter (22.1 cm) soccer ball is approximately 425,000. This is above the critical Reynold's number value, for which reason the soccer ball experiences less air drag than it would otherwise. Otherwise, air drag reduces the range of a kicked soccer ball according to information presented on p. 52. Thus, a predicted (vacuum) range, for a 45 degree high kick, at speeds of 24-34 m/sec, amounting to a range of 59-118 meters, gives way to an actual range of 44-75 meters. There are also more complex equations available that factor the effects of a head or tail wind, of a specified speed, and their effect on the range of the kicked soccer ball. (pp. 130-132).
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Book Description Hodder & Stoughton Ltd, 1972. Hardcover. Condition: New. Never used!. Seller Inventory # P110340053992