03quiz_11

03quiz_11 - Physics 9A-C Quiz week#3 Name ID last 4 F T F T...

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Unformatted text preview: Physics 9A-C Quiz week #3 Name: 4/15/2011 ID last 4: F T F T F T F N mg F T F T F T F N mg Two
crates,
one
with
mass
6.00
kg
and
the
other
with
mass
3.00
kg,
sit
on
the
frictionless
surface
 of
a
frozen
pond
connected
with
an
ideal
massless
rope.

A
woman
wearing
golf
shoes
so
her
feet
 don’t
slip
pulls
horizontally
on
the
3.00
kg
crate
with
a
force
 F 

of
18.0
N. a)

(
3
pts)

What
is
the
acceleration
of
the
system? There
is
a
total
force
on
the
system
of

Í F sys 
=
18N.

Using
the
second
law,

Í F s 
=
m s a

 õ
 
 a = Σ F s m s = 18.0
N 9.00
kg 
=
 2.0
m/s 2 . b)
(2
pts)

What
is
the
acceleration
of
the
6.00
kg
crate? The
rope
couples
the
two
crates
together
so
it
must
be
accelerating
at
the
same
rate:


2.0
m/s 2 ....
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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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