A Baseball Pitcher Loosens Up His Pitching Arm

Multiple Choice

A baseball pitcher loosens up his pitching arm.He 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 12 m/s in a time of 0.40 s,what torque is applied to the ball while being held by the pitcher's hand to produce the angular acceleration?

A) 1.1 N*m
B) 11 N*m
C) 7.2 N*m
D) 1.4 N*m