angular acceleration
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A volleyball player spikes the ball. At the instant that she begins to extend her shoulder to bring her arm forwards, her shoulder is in 225 degrees of flexion. She contacts the ball 0.185 s later with her shoulder in 164 degrees of flexion (and extending). 0.118278688525 s later, at the end of her follow-through, her shoulder stops extending at a flexion angle of 125 .
What was the average
- before ball contact: deg/s2
- after ball contact: deg/s2
Use the convention that flexing is positive
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