I Review I Constants Your roommate is working on his bicycle and has the bike upside down. He spins the 56.0 cm -diameter wheel, and you notice that a pebble stuck in the tread goes by three times every second. Part A What is the pebble's speed? Express your answer with the appropriate units. 5.28 m Submit Previous Answers v Correct Part B What is the pebble's acceleration? Express your answer with the appropriate units. HA ? 0.63 s? Submit Previous Answers Request Answer X Incorrect; Try Again; One attempt remaining

Your roommate is working on his bicycle and has the bike upside down. He spins the 56.0 cmcm -diameter wheel, and you notice that a pebble stuck in the tread goes by three times every second. What is the pebble's acceleration? Express your answer with the appropriate units.

There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a hand crank. The outer wall of the cylinder is perforated with small holes. You put the wet leaves in the container and turn the crank to spin off the water. The radius of the container is 12.2 cm. When the cylinder is rotating at 2.45 revolutions per second, what is the magnitude of the centripetal acceleration at the outer wall? Number Units #

A tire of a car is about 64 cm in diameter. If the tires rotate 500 revolutions per minute, what is the angular and translational speed of the car in km /min?

A 20 cm diameter circular saw blade spins at 3900 rpm. How fast would you have to push a straight hand saw to have the teeth move through the wood at the same rate as the circular saw teeth?

A person pushes on a lever 0.7 meters away from the axis of rotation with 100 N of force. The rotational inertia of the lever is 35 kg*m2. Calculate the angular acceleration of the lever.

A 5 kg ball with a 0.4 meter radius is rolling on a horizontal surface at 3 m/s. The rotational inertia of the ball is 0.4mr2. The ball rolls up a 30-degree inclined plane. What is the maximum height that the ball reaches?

A figure skater has a rotational inertia of 276 kg m² when spinning with arms and one leg outstretched. She is rotating at 56 rpm. When she brings in her arms, her rotational inertia becomes 85 kg m2. What is her new angular velocity in revolutions per minute? (Note: the randomization of numbers may create very unrealistic situations. Just do the math and enter what you get.) What is her new angular velocity in rad/s?

An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad/s1045 rad/s). If a particular disk is spun at 734.1 rad/s734.1 rad/s while it is being read, and then is allowed to come to rest over 0.368 seconds0.368 seconds, what is the magnitude of the average angular acceleration of the disk?   If the disk is 0.12 m0.12 m in diameter, what is the magnitude of the tangential acceleration of a point 1/71/7 of the way out from the center of the disk?

A rock tied to the end of the string swings at a constant angular rate. If you are told that the string can support a total of 100 N of force before breaking, what is the maximum angular velocity the rock can rotate if the rock has a mass of 0.2 kg, and the length of the string is 0.5m? Give your answer in units of radians per second.