A Baseball Pitcher,loosening Up His Arm Before a Game,tosses a 0.15-Kg

A baseball pitcher,loosening up his arm before a game,tosses a 0.15-kg ball using only the rotation of his forearm,0.32 m in length,to accelerate the ball.If the ball starts at rest and is released with a speed of 23 m/s in a time of 0.4 s,what is the average angular acceleration of the arm and ball?

A) 2.9 rad/s²
B) 28.8 rad/s²
C) 18.4 rad/s²
D) 179.7 rad/s²
E) ​27.0 rad/s²

Correct Answer:

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