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April 19, 2014

Homework Help: PHYSICS

Posted by cindy on Wednesday, March 14, 2012 at 1:36pm.

Question Part
Points
Submissions Used
A baseball pitcher pivots his extended arm about his shoulder joint, applying a constant torque of 170 N · m for 0.15 s to his arm, which has a moment of inertia of 0.53 kg · m2.
(a) Find his arm's angular acceleration and final angular velocity, assuming it starts from rest.
angular acceleration
final angular velocity

(b) Find the final speed of the ball, relative to his shoulder, which is 0.76 m from the ball.

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