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Newton’s1stLaw?
Silentlyobservethedemonstrationsandrecordanyobservations,thoughts,orquestionsthat
youmayhaveaboutwhatyou’reseeing.
Observations
Thoughts
Questions
Afterdiscussingwithyourpartner,doyounoticeanypatternorsimilaritiesamongstthe
demonstrations?Recordyourthoughtsbelow.
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Investigation
Inthetablebelow,describeeachobjectandrecorditsmassingrams.
Object
Description
ObjectMass(g)
Whichobjectdoyouthinkwilltravelthefurthestdistanceintheshortestamountoftime?
Explainyourreasoning.
Prediction:
Usingtheforceapparatusateitherendoftheclassroom,applythesameamountofforceto
eachobjectasdescribedbyyourteacher.Measureandrecordthedistancetheobject
traveledandtheamountoftimethatittookforthatobjecttotravel.Calculatethespeedof
eachobjectonceyouhaverecordedyourdata.
Object
Description
Distance
Traveled(cm)
Time(s)
Calculated
Speed
(cm/s)
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Whatrelationshipwastherebetweenthemassoftheobjectandthespeedandordistance
thattheobjecttraveled?
Whatisthisrelationshipcalledandwhatexactlydoesitstate?
Watchthevideoofthecrashtestdummyduringacollision,basedonwhatyouhavejust
learnedandtherelationshipyou’veobserved,whydoesthecrashtestdummycontinueto
moveafterthecollision?
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How is force measured?
Beforeyoubegintoplanandbuildyourforcemeterthatwillmeasuretheforceofgravity,listthe
materialsthatyouwillhaveaccesstoinordertobuildyourforcemeter.
Materials:
Writedownwhatyouknowaboutgravity:
BasedonwhatyouknowaboutgravityandhowitpullsobjectstowardsthecenteroftheEarth,howwill
youdesignyourforcemeterthatmeasuresgravity?DrawaBlueprintorplanbelow.
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Afterbuildingyourfirstprototypeoftheforcemeter,whatdoyouneedtochangeinorderforitto
matchthemodelprovidedforyou?
WhatistheequationcreatedbySirIsaacNewtonthatquantifiesforce?
Describehowwearegoingtousetheequationabovetocalculatetheforceofgravity.(Remember:Our
weightisthemeasurementofgravityandourmass)
Inthespacebelowrecordyourdataandresultsthatyouusedinordertocalibrateyourforcemeters.
Force
Mass
Acceleration
(Youcalculatethis)
(Youmeasurethisinkg)
(Thistheaccelerationofgravity)
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Period:
Date:
Whydosomeobjectsmoveandnotothers?
Basedonwhatyouhavelearnedsofar,describewhatNewton’s1stand2ndlawsstate:
Newton’s1stLaw:
Newton’s2ndLaw:
Whatisyourhypothesisastowhyanobjectdoesnotmoveeventhoughaforceisbeingappliedtoit?
Hypothesis:
•
•
Usingyourforcemeters,attachawoodblockandplaceitononeofthetexturedsurfaces.
Pullthewoodblockwithyourforcemeterandrecordthehighestmeasurementofforcebefore
thewoodblockstartstomoveacrossthesurface.
DescriptionofSurface/Panel#
Forcemeasurementbeforeobjectmoved
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DescriptionofSurface/Panel#
Date:
Forcemeasurementbeforeobjectmoved
Basedonyourprevioushypothesisandwhatyouhavejusttested,whydoyouthinkthatthewoodblock
doesnotmovewhenyouapplyaforce?Besuretociteevidencefromyourobservations/
measurements.
Drawafreebodyactingonthewoodblockfor4ofthetexturesthatyouhavetested,besuretoinclude
unitsforeachoftheforcesactingontheobject.
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Date:
Newton’s3rdLaw
Afterobservingthestudentsintherollingchairandrecordingyourobservations,createfour
similarsituationsinwhichoneobjectisexerting,orapplying,aforceonanotherobject.
Describeyourfoursituationsbelow.
Situation1:
Situation2:
Situation3:
Situation4:
Basedonyourknowledgeoffreebodydiagrams,balancedandunbalancedforces,and
Newton’slaws,drawwhatyouthinkthefreebodydiagramswilllooklikeforeachsituation,or
system.
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•
•
•
Pairupwithanotherstudentthathasaforcemeterandconnectthemendtoend.
Similarlytothedemonstration,onlyonepersonapplyforcetotheforcemeterwhilethe
otherholdstheotherforcemetertoprovidesomeresistance.
Recordyourobservationsbelow
WhatdoesNewton’s3rdlawstate?
BasedonwhatyousawwithyourforcemeterandNewton’s3rdlaw,recreateyourfreebody
diagramsforeachsituationwithaccuratevectors.
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Collision Safety Research
InyourownwordsexplainwhatNewton’s3rdlawstatesandwhyitissorelevantwhendiscussinghow
objectscollide.
Asexplained,wewillbetestingtheforcesactingonaneggduringacollisionwithastationaryobject,
beforewedoanytesting,drawwhatyouthinktheforcesactingontheeggwillbelikeasitis:
•
•
•
Atthetopoftheramp
Atthebottomoftheramp
AtCollision
AtCollision
Atbottomoftheramp
Attopoftheramp
Basedontheforceyouhaveseenactingonthecaratthecollisionandwhatcanhappentotheegg,
yourchallengewillbetocreateasafervehicleforyoureggsothatwhenthecollisionoccursyour
“passenger”hasahigherchanceofsurvival.
Resources:
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How Air bags work:
http://auto.howstuffworks.com/cardriving-safety/safety-regulatorydevices/airbag.htm
How Seat belts work:
http://auto.howstuffworks.com/cardriving- safety/safety-regulatorydevices/seatbelt.htm
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Date:
What happens to passengers:
http://www.rms.nsw.gov.au/geared/your
_driving_skills/car_crashes/anatomy_of
_a_crash.html
Three Collisions of a Car Crash:
http://buckleup.mt.gov/docs/threecollisions-in-crash.pdf
How Crumple zones work:
http://auto.howstuffworks.com/cardriving-safety/safety-regulatorydevices/crumple-zone.htm
Usingtheresourceprovidedtoyou,whattypesofsafetyprecautionsareyougoingtobuildintoyour
cars?Besuretoexplainhowyoursafetydesignswillworkandwhyyouchosethembasedonyour
knowledgeofNewton’sLaws.
Drawablueprintofyourcarwithlabelsexplainwhateachpartis/constructedof.
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