A Baseball Pitcher Loosens Up His Pitching Arm

Multiple Choice

A baseball pitcher loosens up his pitching arm.He tosses a 0.20-kg ball using only the rotation of his forearm,0.32 m in length,to accelerate the ball.What is the moment of inertia of the ball alone as it moves in a circular arc with a radius of 0.32 m?

A) 7.7 × 10−² kg·m²
B) 1.9 × 10−² kg·m²
C) 3.8 × 10−² kg·m²
D) 1.2 × 10−² kg·m²
E) 6.2 × 10−² kg·m²