Additionally,
you
must
often
propagate
the
error
from
your
measurements
through
your
calculations
and
graphs.
.
Conclusion:
Finally,
after
all
this
worh

go
back
and
answer
the
question
you
stated
in
the
beginning.
Does
your
data
allow
you
to
support
or
reject
your
hypothesis,
or
is
the
data
inconclusive?
Also
do
you
have
anything
you
can
compare
your
results
with

[e.9.
a
value
in
the
literature,
a
second
measurement,
a
measurement
with
a
different
method,
other
lab
groups)?
How
well
does
it
compare
to
such
a
value?
(Cite
references
per
the
APA
Format
Guidelinesl
Lab
3:
Atwood

Machine
mm/dd/20L1.
Newton's
Second
Law:
the
Atwood
Machine
Lab
Report
3
General
Physics
I
(or,
II)
Parker
University
Dr.
Tison
Month
xx,20l1
Introduction:
The
purpose
of

this
lab
is
to
test
Newton's
2nd
Law
of
Motion
by
utilizing
an
Atwood
machine
apparatus.
The
Atwood
machine
will
be
used
to
study
the
relationship
between
mass,
acceleration
and
net
forces,
with
the
distribution
of
the
mass
between
the
two

weights
being
the
independent
variable
and
the
time
the
dependent
variable
within
the
experiments.
Hypothesis:
It
is
hypothesized
that
the
acceleration
of
the
object
observed
will
be
directly
proportional
to
the
net
force
acting
on
the
object
and
inversely
proportional
to

the
total
mass
of
the
object.
Theory:
In
an
Atwood's
machine
apparatus
two
sets
of
unequal
masses
are
suspended
from
a
string
on
either
side
of
a
pulley.
The
larger
mass,
mz,
provides
a
net
force,
Fnet
=
(mz-mr)g

thereby
causing
both
masses
to
accelerate
according
to
Newton's
2nd
Law
of
Motion,
Fnet
=
[mr+m2)a.
Combining
these
2
equations,
the
acceleration
can
be
calculated
by
the
equation,
2.
=
[[mz-mr)/
(mr+mzJ]g.
It
is
also
possible
to
determine
the

acceleration
of
the
2
masses
by
measuring
the
time
it
takes
for
the
masses
to
descend
a
distance
y
to
the
floor,
using
the
equation,
?6=
2y
/t2
Acceleration
will
be
determined
from
the
time
measurement
data
and
will
be

compared
with
the
value
calculated
from
the
known
masses.
Differences
between
these
two
values
of
acceleration
will
be
expressed
as
aYo
uncertainty.

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