HW 12 - 11.10 A 1.0 Kg book is lying on a 0.79-m-high table...

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Unformatted text preview: 11.10) A 1.0 Kg book is lying on a 0.79-m-high table. You pick it up and place it on a bookshelf2.23 m above the floor. a) How much work does gravity do on the book? b) w much work does your hand do on the book“?I ?ic%r3&\ Egret stW‘fi? . _ _ f D int r ‘ kb U 1. . banter); 1 "Fa chi-i ma , NH “Mm-cu mam mwm was —~ 1:1" its? 33—11“!le) 35' m] H .m) WE morn,” lot) 71—44-1413“ Wofk M W '4‘ sun _ 1,3 MUM; EH.]§-“\? fianbf/j ‘1 WW?“ £3?) l 1.41} A 1600 kg elevator accelerates upward at 1.40 rnfs2 for 13.0 In, starting from rest. a) How much work does gravity do on the elevator? b) How much work does the tension in the elevator cable do on the elevator? c) Use the work-kinetic energy theorem to find the kinetic energy of the elevator as it reaches 13.0 m. d) What is the speed ofthe elevator as it reaches 13.0 In? Egan-NAIL Empmmlzkfim 1 ‘3: l V‘ K‘newoSi #1 3010"); Sit. Y5") ; CL '?'—l'l‘l"'9f.$il“‘f “r0 2 1600K?) 1&3“ (wk Rewwfllaim : Q Mail/we’lch RW‘EM'WQW. 0*) MML We. lea cwxvi’t‘j 0v) "Tl/«L thm‘liBT. N?) 1 “WWI—fie?) *2 w che wage-$13)? '1 "Re “asset? b) New— ‘i‘me‘ 1°23 Wfidm cm The; elmméwv‘: wt: TL‘31'33‘) “z. “fruit” ?_ ""W’O‘ 123?: feidrroa 2 mafia—+0») 1 WOW-‘25 (WSW/52 1’ l’kl’mf‘) ': we) 2.0 N If. : 1313(3ij 0 Re CQTA&\’\B (ho-Vt .Qnekm mxea-YE‘V") i on 1% «K; 2 wa—HNT or Y. ~21. 7- - 2 5 9"")130 w '~2.0'53H0‘1‘+ 9.525%: m, £15 1 Q—QDJW—U 3‘- «21310::ch H “L mm “L J. _ _ "2.. “k 1‘ ,_.__” a“? fixfifiémbbw 0": V’s“ 7* l 19/ iemo' 1" l 1.43) Doug pushes a 5.10 kg crate up a 1.90—m-high 20°frictionless slope by pushing it with a constant horizontal force of 22.0 N. a) What is the speed of the crate as it reaches the top of the slope? Solve this problem using work and energy. b)So|ve the problem using Newton's laws. (Tami CLK Repreasen'tak’fimb 10000303 1 WET—51% “5‘1 K3 3 ha ‘53”) e a" 10“ J qu3k ‘2. Vo '3 r Szl'5W/9M15’13‘3NE") 'To Roe} ,; \f, (Wm: Si mA TKQYQ senhifism 1 M «mam aficcfi Kg?1e3€n‘l€kfififi 1 ""’ War) 2 03‘ C "3 '7? fume. i; M b PaT l’e‘mfiw‘hv +0 110‘ clhed‘isfi ($3 wxo’ci'orij‘ -\ '4’ ‘7’ s.» New Fmt§lrb&w%%'9‘k§\a - «Mgfisx shad 2. (Niacin 2—939“ “3 ' z - NNSk: : 9.2M? 5%(‘05 1Q; “ 1: ear a i (3’ F)”; " FVWH 9mm “Fcn9hid 01f" arr) 0‘,” '1 QQSZDI " “0‘5 0‘": CW 2 WLIM GTE“) lfiiflhfigj ‘3' 1 K06, “1 0‘? “3’31- N05”; ulllvoL—wr 1M3 by" \gia‘ 1 Q‘% (3‘? *0/31 7; S’Sgrf) l\_ ‘9‘ '1 I 1.45) Susan's 12.0 Kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 3U°above the floor. The tension is a constant 31.0 N and the coefficient offriction is 0.190. Use work and energy to find Paul's speed after being pulled 3.40 m. (Piclb'rfai 1 JWDBIP-li'g oft? Cos—l {ammo-law of} :- a “H l Tr? --—- {be « s: "f5: li’lckzl’laemmlfi' col “metalm'h W) 1' W + "F wuss“ : l: on TY? : m3 ~Ts=w2>6 -: web we trim/52 — 5! N X 2% 30‘ ': V01"! N w 4) l1 '3" “[0 ~_ 04% mead N :tfi§EHfl mqu --i . "*3 {A' Fnflk 7- ‘30 * FE :1 31M 7R cm ‘56-“ jig-“L?” *3. low“ ’1. L] g N .2 N’ld” 1F.an 9‘ S 11 :F’LISN X (5‘4") 3&9’533‘ QM qu— : imw&1 Hi W) 19" em 4933324: 7‘ "‘1‘? 7‘ ‘96s?" “3512‘059’0/5 | 1.54: A) A 50 g ice cube can slide without friction up and down a 30° slope. The ice cube is pressed against a spring at the bottom ofthe slope, compressing the spring 10 cm. The spring constant is 25 me. When the ice cube is released, what total distance will it travel up the slope before reversing direction? B) The ice cube is replaced by a 50 g plastic cube whose coefficient ofkinetic friction is 0.20. How far will the plastic cube travel up the slope? “Pacer-ml Kawfesglaiistza Know-0553 1028133 I @130" ,- (31-1100“) Kigth/"U Jl‘J‘Lpz-O’z“ iviq’o JULT'Q (1'0 Fwd; as 9 ’ijvicd Ram-hm? W Kefiespflfissg Cannibal-above a} onetij Kt U1. "’1' ‘3, Kid-«t— Ul TKng D .2 / 2- . ' . . - - t +1”) MLTO 007'}: wise-mtg)le +._‘ZKQ>H EE- 2‘91 ‘3 , 'L 0*, mg (ht—hi5 1-217 “QM” l 1 c" ' (Hm) a.” s. km, «W new i as Newt .« as s m 'ggna y Rec-05kgxo‘EY-0fsi ._ M :Qu-kQ/slmes 610w ]Smhg ““ @Q)h.~c.h“on 1 K2, “5‘ U2- ‘Wflsf'm’a ( 0 2' ‘ 3 r, am?— _ MK #33 cc&30’«fl-§ 2%; £33m; kg + 0 6” § W m? 0‘14“) Hg: Icst J?” Z‘HLVJQ maxi-AS W; 0\0 503. V3 *9/52 M ' Qsfip #fiamqg :x’fiqufxoa W425 wcafzo‘s 6"" S“ {0.3 KL cw, m3 £5?) 91"? 30' ‘" 3’3 kéh”); ‘3» “H14: “3’3 03355 53 cm 10% 455 C91") 30” +,M;¢ c0560") 2 25 K (1333?“ 0"“; E, S *1__ K M 2m? CW 230" +14 [(0536) a QEN/vo'Mf QM”???- —--—.._.______‘___fi__‘ 90a west-3 x Calgary/52 (wwwa‘z X03350") ": f3? % (I’D/k- l 1.55) 4.5 kg box slides down a 5.0-m -high frictionless hill, starting from rest, across a 2.3-m -wide horizontal surface, then hits a horizontal spring with spring constant 520 NM. The other end of the spring is anchored against a wall. The ground under the spring is frictionless, but the 2.3-m-[ong horizontal surface is rough. The coefficient of kinetic friction of the box on this surface is 0.27. a) What is the speed of the box just before reaching the rough surface? b) What is the speed ofthe box just before hitting the spring? c) How far is the spring compressed? d) Including the first crossing, how many complete trips will the box make across the rough surface before coming to rest? ‘Pi o io'vi'ml Re p19 sensation t limits-30$: mwm , new) _ rx‘: 9V3") ’ch‘KDN/K) Maw-2% jvd LO ,V3ao To {1331211 I A] Censetvefisfi 6}; “aw “i P‘JW‘ R MA 93(- KO-rUD -:K,+ u, OTiljrqtfioL + 1 MUIL—f-O or, ofygkzétrffkflif- on mus-413's mum-gm my; 2 “5"“9ls Pb} Co-OSW‘M a} 9/1421?) do“ r3: L46, K1+UIW3q : Kz-s—UZ -y 2. . 1 z‘ 013.6%,me +Q—MKW‘ZX *3?sz TO W,.MHW__ V @‘fim/szw— am 0‘2th «3‘ ‘ _ :: Cfl'RCQTO/s 0‘"; g: KCflW)1+*-:f”9‘932 ii‘mmzl ‘ m 491m @3de Q5???“ “+ng ‘+S‘?€ 0 :«j-i wag-(31:; W531 w; Kb :x (%--zew/5') L gm up») A cm W11 6,.) {>99 '1 9-360”) D] - \BOH'ICKL W732. “363% -~_ taste” 693%”st ?‘ ‘5 "9 —_~. £0.58? Enfl/L‘Yj me'jVQAJ‘eél Min may) 0i £13m”)? QckQK Um gm», ’1‘. HLMQ'X O-&}’XH'S”K3 x633 «9/5,: x 12>“) : 2 1’3 ‘3 T 1.. No‘ 6} Camp‘e‘k M195 “2 Elm—“0’3"? m-sar “2E? '6" I I .57) A block of mass m starts from rest at height h. It slides down a frictionless incline, across a rough horizontal surface oflength L then up a frictionless incline. The coefficient of kinetic friction on the rough surface is “k. A) What is the block's speed at the bottom of the first incline? Give your answers in terms of variables at, h, L, 'r’l", and constant g. B) How high does the block go on the second incline? Give your answers in terms of variables m, h, L, i“, and constant g. ‘Ptcibw‘ak Wfi’znfifism Known; ; V0 ‘2. 0 u:2. law/s h‘ cal Refrmniahm :51; N _ gnaw as: A Mb] 11.68) A Porsche 944 Turbo has a rated engine power of21? hp. 30% ofthe power is lost in the drive train, and 70% reaches the wheels. The total mass of the car and driver is 1450 kg, and two-thirds ofthe weight is over the drive wheels. 1 m EEK} A) What is the maximum acceleration of the Porsche on a concrete surface where I g ? B) What is the speed ofthe Porsche at maximum power output?. C) lfthe Porsche accelerates at “mm, how long does it take until it reaches the maximum power output? Kooro~j$f anWQ: liq-lap: letsslw J m: lHS‘OKB P511 To find: “mom, ‘3‘ i 1" “Th. SWC frieh‘emi ricotta} "93; «Am amt 2c meow 2 «swam in t -- 0x 243 --. 73M 2 337971 9 vow); ,flm manna C j) ‘5] lower:— ‘Bl-fiEmRA lea-3m bog/Lot “WM-ea cut ’iLe. winced/s 2 OATH}ng 8U“ I - —_ Mayan-q w [_ I‘ e‘t I 1.8) How much work is done by the force F=(- 4.0 i-6.0j) Nfim a particle that moves through displacement [31:23.0 1 m? How much work is done by the force F=(-4.0 i- 6.0j) Nfin a particle that moves through diSplacement Ar: (-3.0 i +2.0j)m?? “'4 (“WOT east?) - (so?) : EWo‘X%«o)?-T + ("gate-x3“) “l- ” IZT ‘ h) “1, _..') NZ. K“ F2, AT}. ...
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HW 12 - 11.10 A 1.0 Kg book is lying on a 0.79-m-high table...

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