A Baseball Pitcher,loosening Up His Arm Before a Game,tosses a 0.140-Kg

question 12

Multiple Choice

A baseball pitcher,loosening up his arm before a game,tosses a 0.140-kg ball using only the rotation of his forearm,0.290 m in length,to accelerate the ball.If the ball starts at rest and is released with a speed of 24.0 m/s in a time of 0.450 s,what is the average angular acceleration of the arm and ball?

• A)3.13 rad/s²
• B)37.2 rad/s²
• C)15.5 rad/s²
• D)184 rad/s²
• E)25.7 rad/s²

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