A baseball pitcher rotates his arm around his shoulder joint at 80.0 rad/s. Assuming the length of his arm is 0.60 m, the speed of the ball when it is still in his hand is
A) 302 m/s.
B) 133 m/s.
C) 48.0 m/s.
D) 21.2 m/s.
E) 7.64 m/s.

Question

Quizplus · Accepted Answer

The speed of the ball can be calculated using the formula v = ωr, where ω is the angular velocity and r is the radius (length of the arm). Substituting the given values: v = 80.0 rad/s * 0.60 m = 48.0 m/s.

A Baseball Pitcher Rotates His Arm Around His Shoulder Joint