Partial preview of the text
Download Physics chapter Work Power and Energy and more Lecture notes Physics in PDF only on Docsity!
> (JORK =} 7 € 2? | ost | / eo % | ¥ | | How far (S$) —_— re F.s = wove = AK-E POWER AND Fouc ENERGY Fy 3 p® e | ane How long | ‘ (er) | | ‘ F.At = SP Rel= £2 2m Wonk Done By a Constant foxyce t Fsine | a | o A | 8 i —__yFeoso M s OLong cllspm Olong F = (GOSS (ee Bie a Wonk = FS a = a ~ “a (RdD+ Fy SFE: (xt+ yt 2) We ferret Ry thz Wort = (Component of Force). § = (Component of dfigem)-£ Cle =f 2. aS _ (Area. of force olisem fs wor) nae —— . S> dispiace Of POINt Of APPITcation OF force > Seal at aa Depends upon Frame > Sleee of wore tafse™ is Force Feoss FSing & Ramia\ Wor = F.2) Wotk = (Fsing)s [| ‘| | Pinky (2) Al be 4 i ms [rm || t (ne myairaeune Vatidl donot defend on Notuse Of Motion. Wek = Phea~F x net =f, + E.¢,4 Yv 4 a ee ee a eS A 9 a Find work done by Normal Fosce On +he blocte Wey Nosraaj = O Let Pinky beoz cisem of block wet PINKY is Ze¥o Wry Nosmad = +Ve =+Nsg W.¥+ Ramiay Lose clone by Noxmal N LIN=0 Qo" ae c. aa fg. "i ; ™9 Worvk done by G force in AiseM fs Oey Bs Coos 180°) == hy i = 1-J=yuR)N alsplaces a pasticie up 2 Fo f= (2l-J-uk = . tea i (culate Work done a= C8itajJm. calcula , => ig 6-2 +y tF ” Oue-~ A 2k9 mass !Ying on Atable is displaced % the host2ontal direction through Socm. Tre WOK done by the NoSmay Heaction will be \ad oO b) loot C) 100 eg ayiost Que- Aa Force of ON disPlaces an Obsect by lom. TE Wot Aone ‘S SOT +then Aivection of force Make _an angie With dire ction of afspm W= FScosd 50 = lox locoso aos "SN'So 2 O= 60° Que- A Stone of mass m is tied to q string of 'ength Q at one end ano by holding Secong End it tS Whisled iWto Qa hasizontal cfrele, then Worse done willbe \ago b) (ME) RL Cc) (mg) 2RL' ly ait SP ue- & Force f= k5e2 acts on Qa Ppasticle at an angle of 60° With the X-axte The Work g, in clisPlacing the Particle from =, +o 205 Will be » " 2 _» =§ aod => —- aw = F. ac dw = jeoc2 ole cos6eo0 7 an ot pe? oe nt Que- A String js USed +o Pull a block SF Mass m Vertically up by a distance h at QA Constant Acceleration gl3- The work olone by the ON Sion In the string is | a= 4I3 COr— lbh Coso” = inries | = Umgh htt =o in ep m3) a — Temye G mg T=Ume 3 @ue- Block of MaSSm js Pulled along a cisculay axe by means of a constant hori Zontag force F AS Shown. WoxKe done by this Fosce in Putting the block Fxom A +o ® is Sing = X R X=RSING (KOE Axe Bes in) W= FRS'n 60° = eA) Find Wosk done by gravity | when object moves From | A 40 Q Waravity alee (h) 2 ing (hy -ha) <= 6 ha XA h Y) D (KR Sos JHavity = +UVe Wont alone by fuietion > Fuietion Always acig Along th Gadep ena s On Path mn Pret, 5V ‘gt lasak Z yay Cae 27 VS Kinetic 2 Wanavty an _ 0 { One Rotation ReCORMeTent of AWS friction = fudxr cos 180 fuiction) Sow = “Heng { bx meee en, gS SXR) a As om , ) (fre =U Wanavty = + ar a ~~, eager?) Wpyictio = fu S cos|to° rey | Se Wns ie ies. is} WoxHk done by Spring a Wyre - mg cos \ Mean Position | TOCCSCS IOI % Vets Byes aw = Fe olse cos 180" SOOCTSOSOOBESIOO Sdw = - kK {>¢ doc : { Fs ae a, c our VIB TE ae WESKS IY if SIITovasyIyr > pn _— x) > ee (Energy Stored clue {o motion) -€. = 1 mv2xm = p2 Kee 4 mwa) eee ue re 4 ~ SP eel L Stalax Relation bla) K-E. ano No Ae CLION Magnitude of Momen +Um # Two identicag Particle having Same K-E. = False MUSt have Same Momentum, ty ® a > K.€, = K-€, ams => eR + Two Tdenticag Particle navi MUSt have game «K.-C. > Teue Q—v Ls fen K-es er, 7 Fy Que- Two bodies of macces Mm, And m, have Same MoMentum , THE Yatio o¢ their Kk.&. fs ee) haga tas | Ke = p> am ibaa Sof te A mM K-E, ™) E> wns KE, = Oe Same k. U = con stang v2 ; Two bodies With KE: in the Hatio of Yi! axe movin, = (us : + 6 Que en Bh ual Asneati Momentum - The ratio of thenn masses fs Kee, TS ob P= Same) Que- A statione ty Paxticle explodes int, two Particles of masses M, and m, Which move sp, OPPoOSite clit ections vith velouties Yi ane v, Te natio of thelr Kinetic eneszies Ei Ss aa Same as Aun- Bullet 2 A, >, Yest “ _ iow Pe Bete Fext=o0 ieee O = fj oP (a Que-) TWe bodies of masses mi anolm, ce moving WHh Same tcinetic Energy: Tf P; Qncl P, asic ther stespective Momentum 7 the +Hatio PI/P, ts equalte a aimee (P25 lig (pair ae me my i on Py ™, CIE Ex Same) Palm Graph bly P and Ke Ke. =22 KEL = Ik-E.(y) = te ! —® GHorh blw Jik-€, and (7p) a M= Constant P= V2 mle -€ nes q ©ONStant a iS a oo Smart Change Use Srroy Analysis aes P= x 2m PeSe =o AP. am re (> mM ar. M= Constant - loo x AkK-E] = K-E An momentum P= Jamke Pe fee ‘age Change mo th Que - If +. Change din SG UNS 2/5 den fio Jee. ky ie (y - ) Je-E Y = ~™* 4 (Je P= Gace Laxge v . Constant )/* chan: e Pe See, | histo Waren looxAP 2 lake xlool Oe Pp 2ee | InP UPtO BY. | ee) | loo x AP = 1 AK-E. loo P oe e\°54 Change ta ——_! x loo 3; bs iy x Wo P i ‘hage Change | aS Que- ke. of a body TS increased by YY . WHat fs the Pexcent Uncrease un the momentum.’ KE, Se UIs OF + EF aCe i ee “Yoo Ye = Jeep Pp= ie ee = fiz x 100 = 20%. = {10 MIF t-E. fs Incvease by U4 then Es = [YUy. tc E; = I x ee; (00 oF (ED) FS) terres Sh Pogue / then, SrA PGS FE; WIP kG is increase by Sos then k:Ef = I307- RE, re ee TS Aeckeases by IF +! then «Ep = BI RET Temete Changed to Sov. then c- ERs Joy: ey Quee ce ie of q body is Increased ey 200%. then Pexcentage Change L A Momentum will be K-E, =) YooR - G; k-E-f = UO0O x ke-€ t lo Go P= Sets = S¥xt00 =2X (OG = 200 of. o 6 + Yeceudo = AKE V= Consiant m P= Constant ea T= constant . , —— ‘ame W OHK Energy Theorem WOHXK done by all Force is Teer Serataed fre ec. ~ S= Constant OR-E= REP REs ey Fs Mass For TSt object Wan = KEf-k l ona SF Py ey = 2 . For 2nd obiect fee? aN gti’ KE) = | Meg) o i Co x - eo eo eo e tm , eeree \ Ca) rR RAAR RE Que- Undex the action of a force, 4 2kg body moves Such that tts POSItION kK as Q Function Of time + is diven by <= ercmmCOheke x TS tn meters anol + an Seconds. The work clone by the force x, First two Seconos is ere O tesa OlePend on Path 3: Cle Pencig On Pate, Y OTe te qual EEE aS. Change Ria GE 4g Just a hame ape ES =[Fas Biven to -Ve woye olone by Cur Be Geetha: « § Ss =] =) 9 ad ose =v=l ot ae 3 We Ake By &F- i<-€; os 2 2 G COM fv2- vi r [ [ iJ Vis fo) = alk 2 (Lae 02 2 Lf J Viste SESE = UM 5 tabs Toute : 3 3 | Wonk done ep enag On Frame of Reference Wonk done by guavity a But wasik done Goes not Stil by Frulctton =) A ad ==) =) A ~ SD EFT Force > Nor eg aa oft COME def en et “A Sel CH ,dé aome ie Que- Work clone Th bung ing Obsect fon, AoW Slowly Peon en F/),-y Potentiag energy ay mee =476.3 <=> Wey | WNreg =A (Bet; Law) Oly = Ue ~ Un Bee = Ug (- 305) Yo = So = UR Up = (oar CrHavitati ial Ener Qavitational Potentia; Ene 99 @ h A a ae -—Wer =-AU Lug- Ua 7 = "gh Tf Hef jg at Q : Caio 4 pi @ TF Un = 0 (tet) es" 7 Wee pinky 97 Un = mgr - E-mgh] = Ug - Up OR nike Ug = mgh sf on eee ee m) Us mgh @) h WW, as Wvertiea ver el 4 ms, pee \ SS a aa U=0 Sine Avertica) h b i‘ We 9 Chvea ticai) 4 U= mgt ) (UF hgh st Wonk oO on SAN, : & 8Y GHavitation Field only Potential SPrerve (MR) SEXIER RKRKKKKRRRKRRAKRRRRA Rod (ML) cmt) ld] ! i | | /% -e-en oh | if /o|h U= “iE ee U> Mg 
