A Baseball Pitcher Loosens Up His Pitching Arm

question 8

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

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