Physics 111
10/21-23/13
LAST name_ Section______________
First name______________ Lab Exam A"student"has"acquired"data"on"the"motion"of"a"cart,"and"created"the"following"mathematical"model"of"the"
data:"
"
x(t)%="2t%%+"4
"
I’ve"omitted"the"units,"but"it’s"the"usual"SI"units"of"meters,"seconds,"etc."Based"on"this"model,""
"
Where"is"the"cart"at"t"="0?"
How"fast"is"going"at"t"="0?"
Which"way"is"it"going"at"t"="0?"
What"is"its"acceleration"at"t"="0?"
"
Can"this"model"be"used"to"tell"where"the"cart"is"at"t"="2"s?"If"so,"explain"how"would"you"do"it."(I’m"not"
asking"you"to"do"it,"just"to"explain"how"you"would"do"it.)"If"not,"explain"why"not."
"
Can"this"model"be"used"to"tell"what"the"acceleration"of"the"cart"is"at"t"="2"s?"If"so,"explain"how"would"you"
do"it."(I’m"not"asking"you"to"do"it,"just"to"explain"how"you"would"do"it.)"If"not,"explain"why"not."
"
Can"this"model"be"used"to"tell"what"the"velocity"of"the"cart"is"at"t"="2"s?"If"so,"explain"how"would"you"do"it."
(I’m"not"asking"you"to"do"it,"just"to"explain"how"you"would"do"it.)"If"not,"explain"why"not."
"
%
%
A"student"has"acquired"data"on"the"motion"of"a"cart,"and"created"the"following"mathematical"model"of"the"
data:"
"
x(t)%="3t2""M2t%%+"6
"
I’ve"omitted"the"units,"but"it’s"the"usual"SI"units"of"meters,"seconds,"etc."Based"on"this"model,""
"
Where"is"the"cart"at"t"="0?"
How"fast"is"going"at"t"="0?"
Which"way"is"it"going"at"t"="0?"
What"is"its"acceleration"at"t"="0?"
"
Can"this"model"be"used"to"tell"where"the"cart"is"at"t"="2"s?"If"so,"explain"how"would"you"do"it."(I’m"not"
asking"you"to"do"it,"just"to"explain"how"you"would"do"it.)"If"not,"explain"why"not."
"
Can"this"model"be"used"to"tell"what"the"acceleration"of"the"cart"is"at"t"="2"s?"If"so,"explain"how"would"you"
do"it."(I’m"not"asking"you"to"do"it,"just"to"explain"how"you"would"do"it.)"If"not,"explain"why"not."
"
Can"this"model"be"used"to"tell"what"the"velocity"of"the"cart"is"at"t"="2"s?"If"so,"explain"how"would"you"do"it."
(I’m"not"asking"you"to"do"it,"just"to"explain"how"you"would"do"it.)"If"not,"explain"why"not."
"
"
"
" Physics 111
10/21-23/13
LAST name_ Section______________
First name______________ Lab Exam "
"
"
Give"a"possible"mathematical"model"for"a"cart"that,"at"t"="0,"is"located"to"the"right"of"the"origin,"and"is"
moving"to"the"left"and"slowing"down."(1"pt)"
"
Because"of"your"physics"skills"you"have"been"selected"to"scout"locations"for"the"first"movie"to"be"shot"on"
another"planet.""However"while"there"an"alien"sneaks"up"behind"you"and"hits"you"on"the"head.""When"you"
wake"up"you"cannot"remember"what"planet"you"are"on,"but"you"do"have"a"table"of"gravitational"
acceleration"on"the"different"planets"and"a"ball"you"can"throw.""Use"the"specified"data"file"in"Logger"Pro"
for"a"ball"that"is"thrown"straight"up"and"the"position"measured"using"a"motion"detector"from"lab.""Use"the"
modeling"techniques"you"learned"in"lab"to"determine"what"planet"or"planets"you"could"be"on.""Write"down"
your"model"equation"in"the"way"that"you"learned"in"lab."Sketch your graph and label the axes. (8 pts)"
"
Planet'
'Jupiter'
Neptune'
Saturn'
Earth'
Uranus'
Venus'
Mars'
Mercury'
Moon'
Pluto' Gravity'
24.9%m/s2%
11.1%m/s2%
10.4%m/s2%
9.8%m/s2%
8.9%m/s2%
8.9%m/s2%
3.7%m/s2%
3.7%m/s2%
1.6%m/s2%
0.58%m/s2% "
"
"
"
"
"
"
"
"
"
"
" Find the specified data file in LoggerPro of cart masses and acceleration. Use the modeling techniques you
learned in lab to find a mathematical model describing the dependence of acceleration of the cart on the cart's
mass. Write down your model equation and provide a physical interpretation of the parameter(s). Sketch your
graph and label the axes."(4"pts)

 

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