ࡱ> &(%_ $bjbjPP 48y:<\y:<\$ dd$l$.UUU=$?$?$?$?$?$?$$%(c$UNUUUc$qx$%%%U =$%U=$%%:#,#0ӉL_.E# )$$0$O#R.)L.)#.)#UU%UUUUUc$c$LUUU$UUUU.)UUUUUUUUUd> : Name ____________________________ Date _________________ Speed of a Toy Car Lab #: ________ Background: How long does it take a car to move 150 centimeters? We all have a good idea that if it takes a smaller period of time to move 50centimeters, the car must be moving faster. But how do we measure the speed of a toy car. In your own car, it is easy because engineers have designed a speedometer that automatically tells you how fast your car is moving. A common unit for speed is miles per hour. From this it is easy to figure out the formula that we have to use to calculate the speed of a toy car. Miles is a unit to measure distance. Hour is a unit to measure time. The word PER stands for division. So, if Miles Per Hour = Miles / Hour we can replace miles with distance and hour with time and we get the following formula:  EMBED Equation.3  In this lab, you are going to determine the speed of a toy car. Materials: Toy Car Tape Stopwatch Meter Stick Predict: If you record the time it takes for the car to move 50 centimeters, then record the time it takes to move 150 centimeters, will there be a difference in the speed of the car between the two runs? Explain your prediction:  Procedure: See image below: Lay your meter stick on the floor. Put a long piece of tape going horizontally form the meter stick at the following distances: 0 meters, 50 cm, 100 cm, and 150 cm. Write the distance on each piece of tape 150 cm 100cm  50 cm Meter stick 0m Place another piece of tape 10 cm behind the 0m mark and write START on the tape. See below 150 cm 100cm  50 cm Meter stick 0m  START CALL THE TEACHER OVER TO CHECK THIS BEFORE MOVING ON Place the front of the cars wheels at the starting line. Give it a push and START the timer when the car reaches the 0m MARK STOP the timer when the front wheels of the car reach the 50cm MARK. *You have to pay careful attention to when the car reaches the 50 cm mark!* Record this time in the data table below . Repeat this procedure for the 50 cm mark for 2 more trials. Record the data each time. Calculate the average time and record it in the table. (time for trial 1 + trial 2 + trial 3 = _____ / 3 trials) Round your answer to the nearest tenth Calculate the average speed and record it in the table. (S = D/T ) Round your answer to the nearest tenth Repeat steps 3-7 for the 100-cm mark and 150-cm mark. Distance traveled (cm)Time Trial 1 (s)Time Trial 2 (s)Time Trial 3 (s)Average Time (s)Average Speed (cm/s)50 cm 100 cm 150 cm  Use the back of the lab as scrap paper for calculations if necessary Questions: Answer in COMPLETE sentences! At which distance, 50cm, 100 cm or 150 cm, did the car travel at the fastest speed? Was there a significant difference in the speed of the car while it traveled 50 cm versus 150 cm? Explain why. What happens to the time of travel of the car if the distance that the car moves increases? As the car moves away from the starting point (0 cm) what happens to its speed? What is the reason for doing the experiment with multiple trials? Why not let the car run one time and record the time? How could this experiment be improved? How do you think a ramp would have affected the speed of the car? ">?Qabcdo m r V W j k l m n o  $ % * / ɤՊhQMjhT5>*hQMj h`VhTjhQMjh5EHU&j0Q hQMjh5CJUVaJjhQMjhT5Uh9chQMjhT5hC&h`VhT5>*h\56CJaJh(h(56CJaJh(hT2?bd l m U V n o $IfgdT$a$gd(gdT/ 0 X [ \ a r | 06OQ_`abwx|} 467;=ABsvw{|ܷܷܷܷܷůܥܥťܖ h\h\h\h\5h\h\5>*hQMjh\5jh\UmHnHu h\5jhQMjUmHnHuhQMjh\ hT5>*h`VhT5>* h9c5>*hThC&; xssssgdQMjh^hgdTp^pgdQMj & FgdTgdThkd$$Ifl*+ t0644 layt"`5 MNOY_aht{|UV[\gdTgd\ & Fgd\h^hgd\p^pgd\gd\ & FgdT*+:Udklp| '(*IZ\jkl  %-378<RSY|}~俷ܨh9hT5>* h\5>* h(5>*hW hW 5hW hT5 hW 5hchPuhxh9ch\hT5hThW h\h\h\56h\h\5 h\5;\ $$&`#$/Ifa$gd\gdc & Fgdx  ,$$&`#$/Ifa$gd\kd.$$Ifl.ֈW#+AAAAAA t 6`0+644 layt\$&`#$/Ifgd\$$&`#$/Ifa$gd\,$$&`#$/Ifa$gd\kd$$Ifl*ֈW#+AAAAAA t 6`0+644 layt\ !"#$$&`#$/Ifgd\$$&`#$/Ifa$gd\$%,,$$&`#$/Ifa$gd\kdH$$Ifl*ֈW#+AAAAAA t 6`0+644 layt\,-./012$&`#$/Ifgd\$$&`#$/Ifa$gd\23}~,'"gdxgdW kd$$IflGֈW#+AAAAAA t 6`0+644 layt\~wxyz{|-./gd:S & Fgd:SgdW  & FgdTgdT4XYgij ,-01JO#$hthUShh:Sh\hkihThW /0123#$ & Fgd\gd\ & FgdTgdTgd:S21h:p!'/ =!"#$% Dd x b  c $A? ?3"`?2 XITqC?D*`! XITqC? 2xuO1_ p"J5McXtW/aÀ#8g !!}D{i>/k"Q#J:eK2~.ӱ1bim9%x$G1; &Ger<"O8D!2Y%e:W߿(|+u=(X%;MvRw5>Owbi*o?@ARoot Entry  FԉL)Data WordDocument 48ObjectPool vЉLԉL_1360146460FvЉLvЉLOle CompObjfObjInfo  FMicrosoft Equation 3.0 DS Equation Equation.39q~  eSpeed =   eDistance  eTime   or simplified as  s = dtEquation Native 1Table-B)SummaryInformation( DocumentSummaryInformation80Oh+'0  $0 P \ h tLab: Speed of a Toy Car Mike McKeeNormalDevin Hagendorn2Microsoft Office Word@@zt#@,kL@,kL. ՜.+,0 hp|     Lab: Speed of a Toy Car Title  F Microsoft Word 97-2003 Document MSWordDocWord.Document.89qs2 0@P`p2( 0@P`p 0@P`p 0@P`p 0@P`p 0@P`p 0@P`p8XV~ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@_HmH nH sH tH @`@ TNormalCJ_HaJmH sH tH DA D Default Paragraph FontRi@R  Table Normal4 l4a (k (No List jj T Table Grid7:V0@@@ x List Paragraph ^HH /Y Balloon TextCJOJQJ^JaJN!N /YBalloon Text CharCJOJQJ^JaJPK![Content_Types].xmlN0EH-J@%ǎǢ|ș$زULTB l,3;rØJB+$G]7O٭VvnB`2ǃ,!"E3p#9GQd; H xuv 0F[,F᚜K sO'3w #vfSVbsؠyX p5veuw 1z@ l,i!b I jZ2|9L$Z15xl.(zm${d:\@'23œln$^-@^i?D&|#td!6lġB"&63yy@t!HjpU*yeXry3~{s:FXI O5Y[Y!}S˪.7bd|n]671. tn/w/+[t6}PsںsL. J;̊iN $AI)t2 Lmx:(}\-i*xQCJuWl'QyI@ھ m2DBAR4 w¢naQ`ԲɁ W=0#xBdT/.3-F>bYL%׭˓KK 6HhfPQ=h)GBms]_Ԡ'CZѨys v@c])h7Jهic?FS.NP$ e&\Ӏ+I "'%QÕ@c![paAV.9Hd<ӮHVX*%A{Yr Aբ pxSL9":3U5U NC(p%u@;[d`4)]t#9M4W=P5*f̰lk<_X-C wT%Ժ}B% Y,] A̠&oʰŨ; \lc`|,bUvPK! ѐ'theme/theme/_rels/themeManager.xml.relsM 0wooӺ&݈Э5 6?$Q ,.aic21h:qm@RN;d`o7gK(M&$R(.1r'JЊT8V"AȻHu}|$b{P8g/]QAsم(#L[PK-![Content_Types].xmlPK-!֧6 0_rels/.relsPK-!kytheme/theme/themeManager.xmlPK-!R%theme/theme/theme1.xmlPK-! ѐ' theme/theme/_rels/themeManager.xml.relsPK] $ 8/ $  \ $,2~/$ Vjl$ :8 @( ^(  B  3 ԔB @ 3 jJB @ 3 jJB @ 3 jJB @ 3 jJB  3 ԔB @ 3 jJ B  @ 3 jJB  @ 3 jJB  @ 3 jJB @ 3 jJ B S  ?`    OP_aw|$ l* t.t1e 1t{ t t l* t.t 1e 1t { t t2 t& &,& 333 3 7 8 |  / 0 # &  3 7 8 |  / 0 " & baV> ')p#hh^h`o(. 88^8`hH. L^`LhH.   ^ `hH.   ^ `hH. xLx^x`LhH. HH^H`hH. ^`hH. L^`LhH.hh^h`o(. 88^8`hH. L^`LhH.   ^ `hH.   ^ `hH. xLx^x`LhH. HH^H`hH. ^`hH. L^`LhH.baV')p&Zp        &Zp        W zpW ,!'H2"`5jEUS\9cQMjPuxC&kiZx8iGct/Y':ST($ & @0 0 0 0 $ @UnknownG*Ax Times New Roman5Symbol3. *Cx Arial5. .[`)TahomaA$BCambria Math"hL;'L;'3". . x24  3Q HP ?T2!xx Lab: Speed of a Toy Car Mike McKeeDevin Hagendorn  CompObjr