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Equations of Rotational Motion
12. Rotational Kinematics / Equations of Rotational Motion / Problem 6
Problem 6

What is the angular acceleration of the forearm when it propels a 1.50-kg apple from rest to 8.6 m/s in 0.39 s, solely through elbow rotation driven by the triceps muscle? Note that the radius of rotation is 0.32 m.
Illustration of a forearm with an apple, showing the axis of rotation at the elbow and the triceps muscle.