A baseball pitcher brings his arm forward during a pitch, rotating the forearm about the elbow. If the velocity of the ball in the pitcher's hand is 36.9 m/s (about 83 mph) and the ball is 0.290 m from the elbow joint, what is the angular velocity of the forearm?

A Ferris wheel with radius 14.8 m and initial angular speed 0.18 rad/s starts speeding up with constant angular acceleration 0.28 rad/s2.  The magnitude of the resultant (total) acceleration of a point on the edge of the wheel 1.4 s after it starts speeding up is (enter your answer with two significant figures)

A centrifuge rotor is accelerated for 23. s from 8000 rpm to 13000 rpm (revolutions per minute). (a) What is its average angular acceleration? (b) Through how many revolutions has the centrifuge rotor turned during its acceleration period, assuming constant angular acceleration?

The dung beetle is known as one of the strongest animals for its size, often forming balls of dung up to 10 times their own mass and rolling them to locations where they can be buried and stored as food. A typical dung ball formed by the species K. nigroaeneus has a radius of 1.80 cm and is rolled by the beetle at 6.15 cm/s. HINT (a) What is the rolling ball's angular speed (in rad/s)? rad/s (b) How many full revolutions are required if the beetle rolls the ball a distance of 2.40 m? rev