10. A potter’s wheel moves from rest to an angular speed of 0.20 rev/s in 30.0 s. Assuming constant angular acceleration, what is its angular acceleration in ?

11. A drill starts from rest. After 3.20 s of constant angular acceleration, the drill turns at a rate of 2628 rad/s

a. Find the drill’s angular acceleration.

b. Determine the angle through which the drill rotates during this period.

12. A tire placed on a balancing machine in a service station starts from rest and turns through 4.7 revs in 1.2 s before reaching its final angular speed. Assuming that the angular acceleration of the wheel is constant, calculate the wheel’s angular acceleration.

13. The tub within a washer goes into its spin cycle, starting from rest and reaching an angular speed of in 8.0 s. At this point, the lid is opened, and a safety switch turns off the washer. The tub slows to rest in 12.0 s. Through how many revolutions does the tub turn? Assume constant angular acceleration while the machine is starting and stopping.

22. The Emerald Suite, a revolving restaurant at the top of the Space Needle in Seattle, Washington, makes a complete turn once every hour. What is the tangential speed of a customer sitting 12.5 m from the restaurant’s center?

23. What is the magnitude of the centripetal acceleration of the customer in problem 22?