09quiz_11

09quiz_11 - Physics 9A-C Quiz week#9 Name ID(last 4 . . 1 1 cm= m 2 = m 2.

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Physics 9A-C Quiz week #9 Name: 5/27/2011 ID(last 4): A
meter
stick
with
a
mass
of
0.160
kg
is
pivoted
about
one
end
so
it
can
rotate
without
friction
 about
a
horizontal
axis.

The
moment
of
inertia
for
a
stick
rotated
about
the
center
of
mass
is

  cm =
 1 12 m 2 and
the
moment
about
the
end
is
 p =
 1 3 m 2 .

The
meter
stick
is
held
in
a
 horizontal
position
and
released.

As
it
swings
through
the
vertical,
calculate:

 a)
(
3
pts)
the
change
in
gravitational
potential
energy
of
the
stick;

 Gravity
acts
at
the
center
of
mass.

The
work
done
by
gravity
is
-
Î U cm .
The
potenial
energy
of
 the
meter
stick
will
be
least
when
it
is
vertical,
at
which
point,
the
center
of
mass
will
have
 lowered
by
0.5
m

õ


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This note was uploaded on 09/28/2011 for the course PHY 9A taught by Professor Svoboda during the Spring '08 term at UC Davis.

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