ࡱ> gfzakW7{y3T( `!I=ٷ:)!1zvlxŘ}hU/wowNѮ:,SI2Mml9jޜ R41T *SC `%;ݽ9=×6>ys"}!hU ɔ`eW%e9h[" uB ^/Z|$u D#Zsfkz9Bb !t \ߟ|L"gO 9\*2Gh\t}2fI sQv(po{ue>Jg^7n'!ɝt7o MP>{iϴ@{U)(+Mߛnڱ@9{L;(goi'll)@y26(L3wiswi[`'r(oiWr0m%PjjOw+WsmnE]V_XGPFp_2YQ'SVԽt y 1b#oȧF>[G"RԌlʎ,)Eʖ5RF1E/. ߶Zʔ6_RԢ9qޑ=9]ͼ&Q3Mf[! H#pmx -#FwlSޮ*e-XIO;VKET&eRG um-Z,Z{l>A-刭ӛ]OmeIKu zcmG~[M~`+n),ƗbDLr/1_YNeVX{1p63)Z&=^[ȵN*\ʺ /6~ f֪x//Ho`5`!*ߞNBRD{hlxV[OAm)K-HxPS(@4A`hL4RR.⛿w}ȋQH(I3얺\n93ss朳[j@' ˨*´h΅~j~Ոg7G̠ȯDoiV!j^B<FkL(]k{Xb*Yma ǂ2%g]ʩ65Ox%ywi[ҎxkvWg7첲A=ب/X>¿i'T'sy_H$άEo6wZGsĴGkw׀!-"NiD6R_-Hbyъ?˧GajЂf;ŻoY5>GhCqZ(O Z> N_%R&eS]B:sk8o2ve?*Te{`mQ5gnqSkQb8&ksw LSY'FWƲBAaV`!Պ"KUq/Z7h'hlxVMOSA=L[ E|bQc\ XPF J B4|uAt@wZ~I 5sR?yw̝ΝwZA%`! #6a$1jntmA[!9P싈ܼYl9F_%5gK߬فR& bH1(Ʉҵ9%BP5ή[Ơ=%"X)J,ǿ揨\].*,?Rqβ(ZÜuUy_KV͒3?G6ëެG⚬@#?S]^!d. Mix9q0$'dI=\fyAk״lCs]-:HmJcQsTY׬a[CL*'3i!ʀ陹ؔfA4\O쮿t_㉹\zf:f*ٻ~[-yQlWS㰏`!Z;gqT˭rJ(xڥTKkQΙL:Ik-.Fta DB8`b\EADntᦛ"E Q/bGі\8s=9Ap<.ԭW)'{b]^d{ՊXz-u!@ZqnFӠnZAqgs^b[bQ$+4RI4Fw. wPUSOlvh6o&b{O# ? Rv7\埻Xlڗ#|k]s|Z9kurxuU-! R,Z={fLDHv̜DJokƆ|TCd6dlM?9&mgj>1{=al6sJNqJh9)@ԩV_rR4n޳ݡ5^~?uRC[Z=g]ey(uY|yC YDɮ' VqV}?}#1JWO EjЇ*tyM&(   8Drawing 0Presentations.Drawing.1300Presentations X3 DrawingDrawing 0Presentations.Drawing.1300Presentations X3 DrawingDrawing 0Presentations.Drawing.1300Presentations X3 DrawingDrawing 0Presentations.Drawing.1300Presentations X3 Drawing.Drawing 0Presentations.Drawing.1400Presentations X4 DrawingF/ 0|DArialgsRomanTTDaVܖO 0ܖDVerdanasRomanTTDaVܖO 0ܖ" DTimes New RomanTTDaVܖO 0ܖ0DWingdingsRomanTTDaVܖO 0ܖ@DSymbolgsRomanTTDaVܖO 0ܖ A .  @n?" dd@  @@`` 3/   ()5      !"&' )-./01_r$kW7{y3Ti2$I=ٷ:)i2$*ߞNBRD{2$Պ"KUq/Z7h'2$;gqT˭b 0AA@8ʚ;ʚ;g4mdmd$VO 0|ppp@ <4dddd v 0T aV <4BdBd  0T0___PPT10 z___PPT9\T <   Friction QuizfLaws of Dry Friction Coefficients of Static vs. Kinetic Friction Impending Motion, Angle of Friction fg-1. Which statement best defines dry friction?*. $ $$a) The force parallel to the surface of two objects in contact with each other. b) The normal force of two objects in contact with each other. c) The perpendicular force of two objects in contact with each other. d) The force that resists an object rolling across a surface. ZY2. What horizontal force starts the object moving, if it weighs 50.0 kg and mstatic=0.60?PZ$$4$$ $$6I   %a) 50.0 N b) 83.3 N c) 294 N d) 491 NR3. What is the normal force in the following figure if W=200 N and Fapplied=100 N?dS$ $$$ $$ $$6@   )a) 100.0 N b) 106.0 N c) 165.8 N d) 200 Nh4. What is the maximum frictional force in the figure below if W=200 N, Fapplied=100 N and mstatic=0.60?i$$$ $$ $ $$ $$PE      (a) 99.5 N b) 106.8 N c) 165.8 N d) 200 N 5. What is coefficient of kinetic friction in the figure below if Fhorizontal=200 N, Fvertical=650 N, W=800 N and the object is moving? $$$$  $$$ $$$!$P?      ) #a) 0.200 b) 0.308 c) 0.600 d) 0.250l6. Compute the coefficient of static friction from the following figure assuming slippage is about to occur.*m  @ #a) 0.902 b) 0.477 c) 0.445 d) 0.431$$ Correct answersa (tangential or parallel force) c (=50.0 x 9.81 x 0.60) c (=200  100 sin20) a (=165.8 x 0.60) b (=Fh/Fv = 200/650) b (=tan 25.5)<o*o'o<*k  Rank yourself  5-6: Consider tribology (friction science) as a career. 3-4: Check that your calculator is using the metric system. 0-2: You are on a slippery slope, increase your normal forces and study habits.     0` !3̙` Q.<ffff3` 3333fff` 3K=̙fff` 3fffff` ff3ff3` aNR>ff` 3fY33` 3f3f>?" dd@&?oAd(@n<)o<6=nA+7%Z', n?" dd@   @@``PR   = 7 ,`(p>> XP(    <\V #" `j V T Click to edit Master title style! !$  0HV "Pe V RClick to edit Master text styles Second level Third level Fourth level Fifth level!     SrB  # VBCE6FGIIQU*VWX @`@$ G"  D0  `B  s *Dg "00  0V "^` V B*   0lV "^  V D*   0,V "^  V D*   dA"޽h ?Light horizontal"` 3f3f___PPT10i. "+D=' = @B + Profile  0 (    <- #" `p  T Click to edit Master title style! !  08W "p`   W#Click to edit Master subtitle style$ $  0 "``  B*   0 "`   D*   0  "`   D* rB  # `BCE6FGjIQU*VWX @`@$ G") D0    dA"޽h ?Light horizontal"` 3f3f___PPT10i. "+D=' = @B +$  0 $(  r  S j   r  S |Pe  H  0޽h ? 3f3f80___PPT10.07n 0N0 `V(  ~  s *$&     6&"`?/  H  0޽h ? 3380___PPT10.  0N0 F>p (  ~  s *<     6"`?_   x   <A ??0 ! H  0޽h ? 3380___PPT10.  0N0 F>(  ~  s *E     6V"`?_   x  <A ?? | H  0޽h ? 3380___PPT10.  0N0 F>(  ~  s *     6"`?_   x  <A ?? { H  0޽h ? 3380___PPT10.  0N0 F>(  ~  s *     6"`?_   x  <A .??0 ! .H  0޽h ? 3380___PPT10.  0N0 F> (  ~  s *dp     6{"`?  x  <A ??P  H  0޽h ? 3380___PPT10. 6  0 6(  r  S Hj     S P0   8haQH  0޽h ? 3f3f80___PPT10.pbY$  0 $(  r  S hj   r  S Pe  H  0޽h ? 3f3f80___PPT10._`(^ >x[ tT3lv @ RDC"A `8$0@ JCE-P-?ʟ@NQTZhzT'm6l-<Η̝wޝDZ:ng}V0\c?ү|@#_xaaYs]G \Ɵ1svZtxwG[W:sb=}j @QHm6,1X ȃl w`Lשھ Vg_ 3q ΐwgOh0AWJ֟|%s T {:blv.U{ÿe!|ۆJO&5>[x=S< F:"6zs|qiQ7ڛS^ZP65U?𦜨5r+RmAp7zWFEq$sy3gQφEbI q8nNeUvR\A gʩ"kKH`sH23Ջכ}Hs?dPV^QZP‘nj/ yx2g)_ObqO(VU\^fCWY_bֆYJ8de HPf(`uh&6yԹQv A:*-D"`un1ʖ+&sgl%Aun5 X5A;eGP.DEԹRP.GԹPI`u(4A`"݈HPnF٭6Թ;Q%`; ([Ol7AeFl/A&ʾMM:=;A܃(1Au! !: =L :'v=%v=>` \!΂ sm(NFPFl4A(:׍qun<&'s{l2Aun_M!֗νe7JP禣`u(5AQun6ʎ#MP$`yu- 6-BmsoeԣWdF=nNiay oAFmȩ#.eü I'!Zk^Ƃ5fcVz&5S)e{GT1"ϥӦ(@)^}/<ן1|\gA/2[a5Qq5Ct!$/'k;aw%]y^zggAI.7S!>n%pAF?M Pvne˰yڂ&x(2 %. {lpf`fVPNjԹ u?x?( 2?4l"^ρ\1jzp`Gk#/.uo_^hMx{G,|(/+v'-ׯ!#t*bN,G@5Pa^'lڛooEEeU[w@Me3(QZXtw\]ӊt?]߀͐9>Р/Z)Z=0c|]>t|ؗ!g1OUt3wbآ β-^-)u% QapC,kY3V~~ h*qv>0zAJȟ wCP uw>IBBtkUDNXBtNT/,z0$޵=`Q 5;^O j82R9F|PO֤Zv%#-s_1CX(׾sW<γլb_'t}XYT3g-O񦸩k}-w;we}s;\cч-)ig0/\ _z%(yއz4@⛸chĔouղ4CVӠF@'!x!Jؓ A0>1BXЧWfz̀>8D51O8}K Qupkhshk.ЙYl+ڥ}mzs /D>*nưFGEVֽV&GSQ)djO#vFz4lKw>~!MC9x(z<͋p.sLs +f5;\ +i_D֖ xBXȴZ1}Rٮ[z&_޽D(|6M~ ]nj͗50qȩַKٙq,f=ˡOw|$3 ȠDZg&>-ImN; /QzZ|IKI%Mo6+Hf곲K{=@d\~-'8%:qi|jՠGK2% Dۏ^;_ x%;|1q}xKfoX;o#hŋL۵3w BndڳiE4Ƹh n<0~j0l.ڷٲNa,_3l޷rQmM>~bg6KIHVcĖl^o3MaĒlcg]o`=nݖnI=gn1֘[iuK1Cy!ټk [m5ƵVy~anu sͮw:Ew3wBK-r   k6uMc!k`Th`D~jZ`cFmE?LC(jcsvv枙3s<1eܑk.Cc.?& B+tGbv+B0 XAV,/UZo,҇Z=_Ouefjx v@?xv23ΥT׿`\W /uZ#n'UZ< Htdc-gWGNGiK)AYlD" *D!hO (7Jع˵R=2(GT *U {ՈV?%{_~N6ŢPTh#I(""&KP-;fb92Kҟ؟5V,t0-na.gɃY9 FuFHQBbSո Z%TJC)ҕ)I#C9o_9fU`=bfaWƗ ZZ3%(,hfzCaNN a{!Yóf?oOћM}n*C:v̨ >ԷhZqYr…4-gN~U1AIx\JUAF˼nRD2[2VнL){R*֤te]' <)!%sO$#ƧZU8jI7,R:wiWg^2m(hpgJvOӵxZ pUwg M`@B@@B"A ` 'HiiHAQdJZ> Ht`*:*v0$GnϹ<8-lwsc}- m_CpCAkq2K *G\F\W-@9U A(p)4D*OE/w99_<(cWu`3[ _g<log]_Ajiy !/~4z#wS 2Ka>C!#.~9NZÓ <0cd!! m@8AӑKA@dFl(_EDo>F{ S%~q_̢RL+Qd*NM()hyF="N Z*P\qj&"O9㽘R:F9džs`ZJn?Mm\+kd'n֪vFl0? !ka70wZWs Wov3;XH{X7m 2ݍx-}=Ȟ`QL? 똝oxЏT~_)q9;wm]iErZm˽YlaT1ҕUT)/-(ۛEOW6BVB\̈́j]hSHu$r9 /). 'ϊaFs`?NyEUEI}rot᦯"~5^~Z<$zZӺ w7g<F%woT_V^QZPbǞ_8V[gs;5kez{˵~nEҫ,/Ǻbigkp_$|sIAt`c(; X&A?w"fHϝysg,uTB?esQ X1A?w>VOϭF UsR`KQvAGPv5A ][K]O[O݌O\$ssw.`;P%`P ~!AC7Qm`osCٿ{ۀk C#~'}A=$F;M9V !f%熣l$Ap~ec9?nBT`7sG-FsQvAt~A lB,3sglAY"KЖ{%&z"xj2O,*-,/9Gt6]$KѮ8I' Zk^5lڱf ݫKÄlTJr,j:'yٮUwtZI:.٥@_7)jslS3r|!nqMPyMxd^t/`t[c#z6(Y'c ,l0τ;x 0;l'}xZxeX8ĝvxo=(2"/&~{^q7wr/Q s7~V"'8.2'X K%a8T}Fbc~)4wYL~ @ G&j95+2%Z)iqJV7Z;9NȌZSO>:_x5<뱄>+5Z}pqbZ6FaT¡Uh3־·myF=p]mk_oo] \Zܕk_Kg9?s2鱯Ιc<\|HszmYD8vomV~}dk&b]}M{-'2"B>wjm` 8/]|SyzcIp 6u|{:VOuVB;=jՏ?zer1 VFP 08>*׌L<J3OG8*s|:waZ Ǐ#l$SM}O=Z=E"VЛ Z@(>:+K6lMW Y*YY 2mM&ǖfssY^GlXAmja~ ! Ctz<6饎{l[0Ȋ:l Q'ޅf:|W&FYoBX/}63?lg}14},7;A n&V]߮DziF"op'ʳܙd@L5ĭnjRo=N/>k% *%\p{3ī$[#ۙZdsWcρm:=91\>` ,BC ܒM܉s\7߂5)ɍ F\rL(lenQ+؍N, `K (bmTogoO4ESyK;:\$v^lYCAY4Ê4x4K3 Z3 zYWvY A') 0l~oV|8x^kA53{(L}@(i7ؕGLjGLGLvJx۱蔺\Jz1xZ =U'77+Ou;6 B /Yf¬ *kiδ:|sueeCsok95tRcbIÕ ̍J頒hڥ@qэ( %*Pcdϗa.\GuW̚MxejaٞCw RԻ١0-NZg^PcjО6(BR-e QXj Yի.A|QX(CE#*d*WՈ!6"j"6!nCmnG!w "!_G܉.݈FNDq Є؅hF܋hA"CF܏&bb/ă6D;ѩ~cd 'l -A d+QH&,&WP$vkIzC6Zc+yYf-Ss0z˄ŮpEfp`4|T[Iԟ G\ KXj)OrOs3j,,|k]P\e2B3>VzwK(ͣHsPLwF/Zsz%͋`{؋@hHZC.v/&Ff$>IwkEu~u0?'m4ڹeռYsZɟE!^c^WfGNrlcПbgr]]H12 Fz;u}=m} Hр{w&yg}o}N{Sh[__wW~[6}FG3΋Dę"xF5/zl/%lV՝ڂww%npΛ` k4v@F+iY q;Xt*:X.+1d5R˼[n.Gٺ7m&+tbEhj{E]x_c'E/ş/ŗt-ԜJc}#%p3Ì Qmƻ ]CHgVzDx[=l}8Z*6ȦB1[nz7 3ayX)D7.$ Ǫ~$vLR7q(R"uԒA+mt_Tm@Y5U'F]ry%ȔCbfNE(zJ,y(S.*FD:~\u")zH^Zzʎ3iy„/(Ž,#E]^K*pXe6::CCt~H>BSjH:pLԲM`#40Psx:}3U{S5!'M^fL.&Y=o>|'<'>4~GϚH5Q }3)L<;QLg'G]5QE?dIe)3_r`:.S}iV:6z/}7¾u).Q`yI)!'iK|o%\\Bp.`I%n>Z 6xZ{P\Wιw,]`7Bv)B`I0j mZt4lim`VflgT: m+3fP|iڙ4Xds-],=;?ι;sϼj8= d,qy ,Y͛b%!bpK?oܰz0zS59'{~e^pÿfL]Mmn̩`AO*2TSMK > ^W6"S]I3X>xḷ!5mBgT3Aۀ @G٠ 0C F/}o4 59hřoPu,DaMs aamOG+I{>:w$A|D QXp##-O"Zm;B|b'a#vD.5ʜ]35GxU+gǥsld 6|Kd't(փ!?f3>'d$+sH2bv{{tme8bE/l`Itݶڽ}(س[PGxgJWEkWņ}f ,Ht+47/85s Gӗ\vT&š m푰&)I?zf7 bXIZ̴ٛtTU7~)95w #u*1N=d)KrULܭT@Y `pN^r>ȫE4kk6Qe3@S_y ɗߠ&Cl? H=-v'ĩvۍڳ;fb[KD8m˷[} D.WZ 'CbKYbN3s%l M <]Bb `0O7# fRZӧ \jfRd6=oȆ5EnP8q"`SZ3v v#au] <}u-WWU;XA%ۡj4'MG9Hd)q9IqGS6S|9Sa7Β {kkUDaJ즃vatv-bv j#o&[Dpsn ̫8YՍLϖ^d tp>i_O``y%{MgJDo[%Sx"H&a˂By>]HF؏xf+P%Γ??tMv6f SY;һpI gsSN.$ss*-_Kp-7ؗ|=ϝfJIv-'Y=+(}R7?,$@2Q)͕oHF=3aiB< ?=1^:??t~Gk>te˲9-P`50{P;з v3k dpVuh|MQA{{-qT$ k|8*=u@_NT_GH!g   &WMFCddlxA EMFd8*PF(GDICx!b $$==^t$0T ( % % V0xx x % % $$AA( " FGDICF(GDIC !b $$=='% % V0 \% % $$AA$$==_888% % W$W % % $$AA( " FGDICF(GDIC km!b $$==_888% % W$jmN % % $$AA( " FGDICF(GDIC l.wFGDICF(GDIC6ljwFGDICF(GDIC FGDICRp@"Verdana9Verdan$(@"Verdan 0 L!0 hO0050(|0$$D00y0 D dv%    T ?UAA  LhFriction Quiz % ( F(GDIC jFGDICRp@WingdingsHP0x0@"Verdana  " & 0 8 : "!"!4L}0-w0-uU0 |0-50(\h,jK0t 0- 00lݶ 0 (x0dv%    TT &UAA &LPoe % ( Rp@"VerdanaD E08k0D  w %(ؚ|| |wO!P+w @w O!l4w?w @w Inww (\ 50(|0`0p P00\( &dv%    TV&UAA&LtLaws of Dry Friction % ( Rp@WingdingsHP00< "0=000((dv50(\0?w @w I0D90 D#k:0dv%    TT *0UAA 0LPo % ( Rp@"VerdanaD E08k0D  w{ %(ؚ|| |wO!P+w @w{ O!l4w?w @w Inww{ (\ 50(|0`0p P00\( 0dv%    T )0UAA0#LCoefficients of Static vs. Kinetic  % ( Rp@"VerdanaVerdan((@"Verdan 0 8!0hO0050(|0$$D 00y0 D dv%    T|1,8UAA8L\Friction % ( Rp@WingdingsHP0x0@"Verdana  " & 0 8 : "!"!4L}0-w0-uU0|0-50(\h,jK0t 0- 00lݶ 0{ (x0dv%    TT <BUAA BLPo % ( Rp@"VerdanaD E08k0D  w{ %(ؚ|| |wO!P+w @w{ O!l4w?w @w Inww{ (\ 50(|0`0p P00\( Bdv%    T ;BUAAB#LImpending Motion, Angle of Friction % (   x-B( --$xx--'--$  \\ ----% --'--% ll--'@"Verdana9?'-. 2  Friction Quiz."System-@Wingdings??????-.  2 & o.-@"Verdana?'???????'?????'-. %2 &Laws of Dry Friction.-@Wingdings??????-.  2 0 o.-@"Verdana?'???????'?????'-. <2 0#Coefficients of Static vs. Kinetic .-@"Verdana?'-. 2 8Friction.-@Wingdings??????-.  2 B o.-@"Verdana?'???????'?????'-. <2 B#Impending Motion, Angle of Friction.-՜.+,0    2On-screen ShowErgomechanics- ' ArialVerdanaTimes New Roman WingdingsSymbolProfilePresentations X3 DrawingPresentations X4 DrawingFriction Quiz.1. Which statement best defines dry friction?Z2. What horizontal force starts the object moving, if it weighs 50.0 kg and mstatic=0.60?S3. What is the normal force in the following figure if W=200 N and Fapplied=100 N?i4. What is the maximum frictional force in the figure below if W=200 N, Fapplied=100 N and mstatic=0.60?5. What is coefficient of kinetic friction in the figure below if Fhorizontal=200 N, Fvertical=650 N, W=800 N and the object is moving?m6. Compute the coefficient of static friction from the following figure assuming slippage is about to occur.Correct answersRank yourself  Fonts UsedDesign TemplateEmbedded OLE Servers Slide Titles ._xwD. Gordon E. RobertsonD. Gordon E. Robertson  !"#$%&'()*+,-./0123456789:;<=>?@ABCEFGHIJKLMNOPQRSTUWXYZ[\]_`abcdehRoot EntrydO)PicturesCurrent User^SummaryInformation(D#PowerPoint Document(wDocumentSummaryInformation8V