In softball, the pitcher uses a “windmill” motion to pitch at v = 32 m/s. This p

Question

In softball, the pitcher uses a “windmill” motion to pitch at v = 32 m/s. This pitcher has an arm of 80 cm. The angular velocity of her arm when the ball is released is 40 rad/s. The pitching motion involves almost 1.5 full rotations and lasts 0.44 seconds. The arm’s angular acceleration is constant, the magnitude= 97.3 rad/s^2

A) The pitcher releases the ball when her arm is pointing straight down (towards the ground). If the pitcher’s hand has a mass of 300 g, and the ball has a mass of 180 g. Draw a free-body diagram; take the hand and ball together as one object. What is its acceleration?

Explanation / Answer

accelaration a = r*alpha= 0.8*97.3 =77.84 m/s^2

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