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

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