Answer: One method of pitching a softball is called the

Chapter , Problem 49

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One method of pitching a softball is called the windmill delivery method, in which the pitchers arm rotates through approximately 360 in a vertical plane before the 198-gram ball is released at the lowest point of the circular motion. An experienced pitcher can throw a ball with a speed of 98.0 mi/h. Assume the angular acceleration is uniform throughout the pitching motion and take the distance between the softball and the shoulder joint to be 74.2 cm. (a) Determine the angular speed of the arm in rev/s at the instant of release. (b) Find the value of the angular acceleration in rev/s2 and the radial and tangential acceleration of the ball just before it is released. (c) Determine the force exerted on the ball by the pitchers hand (both radial and tangential components) just before it is released.