2. The blades of a fan running at low speed turn at 250 rpm. When the fan is switched to high speed, the rotation rate increases uniformly to 440 rpm in 5.85 s. What is the angular displacement of the blades during that time interval?

2. Two students perform a simple experiment. The first student observes the orientation of a stationary disk with a single mark on the edge of the rim. He then looks away. The secondstudent then gives the disk a constant rotational acceleration of 3.0 rad/s2 for a time of 4.0 seconds; she then brings the disk to a halt with constant angular acceleration in a time of 0.10 s. The first student is now allowed to look at the disk again. (a) From the point of view of the first student, through what angle did the disk move? (b) What was the average angular velocity of the disk?

1. A wheel rotating about a fixed axis at a constant angular acceleration has an angular velocity of 2.00 rad/s. Two seconds later it has turned through complete revolutions. What is the angular acceleration of this wheel? 5.00 2. A jet engine, starting from rest, is accelerated at a rate of 5.00 rad/s². After 15.0 seconds, what is the angular velocity of the engine? What is the total angular displacement over this period of time? 3. A merry-go-round is traveling initially with an angular velocity of 5.00 rad/s. A child pushes the merry-go-round over 10.0 revolutions, causing the merry-go-round to accelerate at a constant rate of 1.00 rad/s². What is the final angular velocity of the merry-go-round? 4. An object moves in a circle of radius 2.00 m with instantaneous angular velocity of 5.00 rad/s and angular acceleration of 4.00 rad/s². What is the magnitude of the linear acceleration felt by the object? 5. A fan takes 2.00 s to reach its operating angular speed of 10.0 rev/s. What is…

6. A uniform disk turns at 3.3 rev/s around a frictionless central axis. A nonrotating rod is dropped onto the disk. The rod has the same mass as the disk and length equal to the diameter of the disk. The two objects then turn together at the same rate with the centers lined up vertically. What is the new angular velocity (in rad/s) and new angular frequency (in rev/s)?