A wheel is rotating at an angular speed of 2.0 radians. How much torque is needed to accelerate it to 4.0 radians/s in 5 s? The wheel has a moment of inertia of 0.25 kg.m2 A. 0.01 m.N B. 0.10 m.N C. 1.0 m.N D. 10 m.N

1. The blades of a fan running at low speed turn at 300 rpm. When the fan is switched to high speed, the rotation rate increases uniformly to 430 rpm in 5.30 s. What is the magnitude of the angular acceleration of the blades? rad/s2 f60 ssi f60 0 ssro0

3 1. A uniform solid sphere rolls without slipping down a 28° inclined plane. What is the acceleration of the sphere's center of mass? The moment of inertia of a uniform solid sphere about an axis that passes through its center = mr2. The moment of inertia of a uniform solid sphere about an axis that is tangent to its surface = 7/5mr2. m/s2 E D C 4 22 R F % 5 V T G tv B MacBook Air 22 Y H 7 5 N 00 8 ZA 3 ( 9 K MOSISO O O V P command DUI 04 M option

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)?

Jimmothy has a flywheel. It rotates about its central axis. It starts from rest and accelerates uniformly. After completing 100 revolutions, the flywheel reaches an angular speed of 70.9 rad/s. It's your job to calculate the following: 1. What is The angular acceleration of the flywheel 2. What is The time required to complete the first 50 revolutions. 3. What is The time required to complete the second 50 revolutions.

Suppose a disk with constant angular velocity has rotational kinetic energy 1280 J. If the moment of inertia of the disk is 35 kg-m?, then what is its angular velocity? 8.552 rad/s 9.066 rad/s С. 7.303 rad/s 10.07 rad/s 10.40 rad/s А. D. В. E. 10.14 rad/s F.

A flywheel (I 49 kg m' 21 starting from rest acquires an angular velocity of 233 rad/s while subject to a constant torque from a motor for 5 s. a. What is the angular acceleration of the flywheel? rad/s? b. What is the magnitude of the torque? N m Question Help: Message instructor Submit Question

28. John puts a DVD into the drive in a computer in his Physics lab. John notes the DVD accelerates from rest to a final rotational speed of 657 rev/min while undergoing a displacement of 0.150 rev. What is the angular acceleration of the DVD John would find? A. 100 rad/s2 В. 125 rad/s2 С. 200 rad/s2 D. 800 rad/s2 Е. 400 rad/s2