1. One revolution per minute is about:

2. If a wheel turns with constant angular speed then:
 A. each point on its rim moves with constant velocity
 B. each point on its rim moves with constant acceleration
 C. the wheel turns through equal angles in equal times
 D. the angle through which the wheel turns in each second increases as time goes on
 E. the angle through which the wheel turns in each second decreases as time goes on

3. A flywheel, initially at rest, has a constant angular acceleration. After 9 s the flywheel has rotated 450 rad. Its angular acceleration in rad/s2 is:
 A. 100
 B. 1.77
 C. 50
 D. 11.1
 E. 15.9

4. Ten seconds after an electric fan is turned on, the fan rotates at 300 rev/min. Its average angular acceleration is:
 C. 30 rev/s2
 D. 50 rev/min2
 E. 1800 rev/s2

5. A wheel initially has an angular velocity of 18 rad/s but it is slowing at a rate of 2.0 rad/s2. The time it takes to stop is:
 A. 3.0 s
 B. 6.0 s
 C. 9.0 s
 D. 12 s
 E. never stops

6. A wheel initially has an angular velocity of 18 rad/s but it is slowing at a rate of 2.0 rad/s2. By the time it stops it will have turned through:
 A. 13 rev
 B. 26 rev
 C. 39 rev
 D. 52 rev
 E. 65 rev

7. If the angular velocity vector of a spinning body points out of the page then, when viewed from above the page, the body is spinning:
 A. clockwise about an axis that is perpendicular to the page
 B. counterclockwise about an axis that is perpendicular to the page
 C. about an axis that is parallel to the page
 D. about an axis that is changing orientation
 E. about an axis that is getting longer

8. A particle moves in a circular path of radius 0.10 m with a constant angular speed of 5 rev/s. The acceleration of the particle is:
 A. 0.10p m/s2
 B. 0.50 m/s2
 C. 500p m/s2
 D. 1000p2 m/s2
 E. 10p2 m/s2

9. [FIXED] A flywheel of diameter 2.4 m has a constant angular acceleration of 5.0 rad/s2. The tangential acceleration of a point on its rim is:
 B. 3.0 m/s2
 C. 5.0 m/s2
 D. 6.0 m/s2
 E. 12 m/s2

10. Two wheels are identical but wheel B is spinning with twice the angular velocity of wheel A. The ratio of the radial acceleration of a point on the rim of B to the radial acceleration of a point on the rim of A is:
 A. 1
 B. 2
 C. 1/2
 D. 4
 E. 1/4

11.

Three identical balls are tied by light strings to the same rod and rotate around it, as shown below. Rank the balls according to their rotational inertia, least to greatest. A. 1, 2, 3
 B. 3, 2, 1
 C. 3, then 1 and 2 tie
 D. 1, 3, 2
 E. All are the same

12.

Three identical objects, each of mass M, are fastened to a massless rod of length L as shown. The rotational inertia about one end of the rod of this array is: A. ML2/2
 B. ML2
 C. 3ML2/2
 D. 5ML2/4
 E. 3ML2

13. Two objects, X and Y, are held at rest on a horizontal frictionless surface. A spring is compressed between X and Y. The mass of X is 2/5 times the mass of Y. When the objects are released, the ratio of the kinetic energy of X to that of Y is:
 A. 2/5
 B. 4/25
 C. 25/4
 D. 5/2
 E. 1

14.

The x,y coordinates in meters of the center of mass of the three-particle system shown below are: A. 0, 0
 B. 1.3 m, 1.7 m
 C. 1.4 m, 1.9 m
 D. 1.9 m, 2.5 m
 E. 1.4 m, 2.5 m This is the end of the test. When you have completed all the questions and reviewed your answers, press the button below to grade the test.