Question
A baseball catcher extends his arm straight up to catch a fast ball with a speed...
A baseball catcher extends his arm straight up to catch a fast ball with a speed of 45 m/s. The baseball is 0.145 kg and the catcher's arm length is 0.65 m and mass 4.5 kg. (Indicate the direction with the signs of your answers.)
(a)
What is the angular velocity (in rad/s) of the arm immediately after catching the ball as measured from the arm socket? (Assume his arm rotates counterclockwise after catching the ball.)
rad/s
(b)
What is the torque applied (in N · m) if the catcher stops the rotation of his arm 0.6 s after catching the ball?
N · m
Answers
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