yindeemark (rry82) – Homework 10 – chelikowsky – (59005)
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001
10.0 points
At
t
= 0, a wheel rotating about a fixed axis at
a constant angular deceleration of 0
.
46 rad
/
s
2
has an angular velocity of 0
.
9 rad
/
s and an
angular position of 6
.
6 rad.
What is the angular position of the wheel
after 4 s?
Answer in units of rad.
002
(part 1 of 3) 10.0 points
As a result of friction, the angular speed of a
wheel c hanges with time according to
d θ
d t
=
ω
0
e

σ t
,
where
ω
0
and
σ
are constants.
The angular
speed changes from an initial angular speed
of 4
.
81 rad
/
s to 3
.
31 rad
/
s in 3
.
92 s
.
Determine the magnitude of the angular
acceleration after 2
.
75 s.
Answer in units of rad
/
s
2
.
003
(part 2 of 3) 10.0 points
How many revolutions does the wheel make
after 2
.
47 s ?
Answer in units of rev.
004
(part 3 of 3) 10.0 points
Find the number of revolutions it makes be
fore coming to rest.
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 Fall '08
 Turner
 Angular Momentum, Kinetic Energy, Mass, Work, Moment Of Inertia, Rigid Body

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