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 2.8 rad/sec. After 6.35 seconds, it has completed 14 revolutions. What is its angular acceleration in rad/sec
^{2}
?
4.46 x 10
^{-2}
rad/sec
^{2}
3.48 x 10
^{0}
rad/sec
^{2}
4.41 x 10
^{-1}
rad/sec
^{2}
2.49 x 10
^{1}
rad/sec
^{2}
omit
Question 2
In
Question #1
, what is the pulley's angular velocity at the end of the 6.35 seconds?
88.0 rad/sec
22.1 rad/sec
24.9 rad/sec
13.9 rad/sec
omit
Question 3
From
Question #2
, what is the linear velocity of a point on the rim of the pulley at exactly 6.35 seconds if the pulley's diameter is 38 cm?
9.46 m/sec
1.53 m/sec
4.20 m/sec
4.73 m/sec
omit
Question 4
What is the instantaneous centripetal acceleration experienced by the point on the rim in
Question #3
?
66.1 m/sec
^{2}
117.9 m/sec
^{2}
297.9 m/sec
^{2}
90.1 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 47 meters of cord around the rim?
12.73 seconds
11.12 seconds
9.89 seconds
11.87 seconds
omit
Question 6
Which of the following graphs of
omega vs time
correctly protrays the behavior ot this pulley?
PhysicsLAB
Copyright © 1997-2018
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton