Practice Problems
Rotational Kinematics
Directions:
On this worksheet you will practice using the basic formulas for rotational, or angular, motion.
omit
Question 1
At t = 0, a pulley rotating on a fixed axle with a constant acceleration has an initial angular velocity of 2.1 rad/sec. After 6.30 seconds, it has completed 18 revolutions. What is its angular acceleration in rad/sec
^{2}
?
1.95 x 10
^{-2}
rad/sec
^{2}
3.33 x 10
^{-1}
rad/sec
^{2}
5.03 x 10
^{0}
rad/sec
^{2}
3.38 x 10
^{1}
rad/sec
^{2}
omit
Question 2
In
Question #1
, what is the pulley's angular velocity at the end of the 6.30 seconds?
31.7 rad/sec
18.0 rad/sec
113.1 rad/sec
33.8 rad/sec
omit
Question 3
From
Question #2
, what is the linear velocity of a point on the rim of the pulley at exactly 6.30 seconds if the pulley's diameter is 35 cm?
11.83 m/sec
5.92 m/sec
5.55 m/sec
1.04 m/sec
omit
Question 4
What is the instantaneous centripetal acceleration experienced by the point on the rim in
Question #3
?
200.0 m/sec
^{2}
111.8 m/sec
^{2}
88.1 m/sec
^{2}
154.4 m/sec
^{2}
omit
Question 5
If cord is being wrapped along the edge of the pulley in
Question #1
as it turns, how much time would be needed to accumulate 42 meters of cord around the rim?
7.03 seconds
9.31 seconds
9.71 seconds
10.14 seconds
omit
Question 6
Which of the following graphs of
omega vs time
correctly protrays the behavior ot this pulley?
PhysicsLAB
Copyright © 1997-2017
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton