suppose a fast-pitch softball player does a windmill pitch, moving her hand through a circular arc with her arm straight. she releases the ball at a speed of 31.5 m/s31.5 m/s (about 70.5 mph70.5 mph ). just before the ball leaves her hand, the ball's radial acceleration is 1340 m/s21340 m/s2 . what is the length of her arm from the pivot point at her shoulder?



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