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1
Chap 10
Rotation
Note – this is an outline of the lecture, print this
and take notes on it in lecture It is not the
and take notes on it in lecture. It is not the
complete lecture.
You should attend lecture to
get the complete notes
Images taken from Halliday/Resnick/Walker,
Fundamentals of Physics, 7
th
Edition, John Wiley
and Sons Inc., by permission.
Hints:
17.
a) You know (or should be able to deduce)
ω
,
0
,
and
α
and you want to find , b) You will need to
solve
(quadratic equation) to find
t.
55.
a) Find
a
directly from the distance and time given
in the problem.
b) Apply Newton’s 2
nd
law.
e) Apply Newton’s2
nd
law for a rotating object
e) Apply Newton s 2
law for a rotating object.
61
Look at motion of center of mass.
Apply
conservation of mechanical energy.
65.
Find moment of inertia.
Note that you will need to
use the parallel axis theorem.
Then use conservation
of energy to find the angular speed when the rigid
assembly is inverted.
Rotational variable
r
θ
s
r
s
θ
π
−
=
Δ
=
=
nt
displaceme
Angular
[radians]
2
revolution
1
[radians]
/
1
2
dt
d
t
av
av
=
Δ
Δ
=
locity
angular ve
ous
Instantane
locity
angular ve
Average
Rotational
variablecont
r
θ
s
Δ
=
on
accelerat
angular
Averag
dt
d
t
av
=
Δ
locity
angular ve
ous
Instantane
on
accelerati
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 Spring '08
 oshea

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