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 2.2 rad/sec. After 6.04 seconds, it has completed 15 revolutions. What is its angular acceleration in rad/sec
^{2}
?
2.57 x 10
^{-2}
rad/sec
^{2}
2.9 x 10
^{1}
rad/sec
^{2}
4.44 x 10
^{0}
rad/sec
^{2}
3.64 x 10
^{-1}
rad/sec
^{2}
omit
Question 2
In
Question #1
, what is the pulley's angular velocity at the end of the 6.04 seconds?
26.8 rad/sec
15.6 rad/sec
94.2 rad/sec
29.0 rad/sec
omit
Question 3
From
Question #2
, what is the linear velocity of a point on the rim of the pulley at exactly 6.04 seconds if the pulley's diameter is 39 cm?
5.66 m/sec
1.34 m/sec
11.31 m/sec
5.23 m/sec
omit
Question 4
What is the instantaneous centripetal acceleration experienced by the point on the rim in
Question #3
?
86.5 m/sec
^{2}
188.8 m/sec
^{2}
164.1 m/sec
^{2}
102.5 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 40 meters of cord around the rim?
9.65 seconds
10.17 seconds
9.18 seconds
7.15 seconds
omit
Question 6
Which of the following graphs of
omega vs time
correctly protrays the behavior ot this pulley?
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