Work and Energy Class 9 PDF

nt.x einitiea Aork : Hok said do be dane when a orca iuplaee m bjet thauyk dome datonce tner4= tme defimed sthe abUty of 6odu t do Nork. 4t unit goule. "Aere're mam osm oeneg...

nt.x einitiea Aork : Hok said do be dane when a orca iuplaee m bjet thauyk dome datonce tner4= tme defimed sthe abUty of 6odu t do Nork. 4t unit goule. "Aere're mam osm oeneg for epotentiol kimetio et. ehesy enex heat inegy ole dt defme Jhe ate of dom Work. e. P Nork domne t'me Unit o ponee Natt Nos - foule ond t =14 dken P-lule Xecond enua t o I Watt o0 Hatt å dhe fonet hen 4 foule of enek i consumed im 2 second mtext TuestigmK 1 A foce of +N acts wn an sbjet. he dapa- cement sau &am im. the dfketion of the fos te. et us takl t that the fore -actt usn h e beet shausd. the CS displacnent. hat  ohe work dome im t i caue ? As &t We kmow that- Work dome orce X Diplacement Here en 4oree- ¥N dplacement 8 on Work dne Force X = DAflacement= +X 8 -5 Aen do we say shat Nork a done Ae 8-) NRen a Body of Some man dplare smal ditanek fron a sesenemae ßoint due to force then We can Aa that Nork i deme an expxeston 4or the Hork dome hen sthe force actima, Am obect in stke udiect e n o i t dißlokement Aay 8- let Be the mas o bod ond'F de the force actinon it M 3 Due to orce 0etim m the Bool,, she booly aiblore 4om poaftion to B. ketthe dhtane Coresed the directen dublacement Ym im then, Nork dome N FX Un?t oNork i joule CNF:s CSScanned VWIL CamScanneer  Defme 1 J of wotk Ar t We KmoON that W F NoW hen F IN, lm then IN.Im H- joule Imm= o Aork ia said to Be 1joule Nthen orce of I Neotn displhee, uam dhyect teush a dat -Ame oIm 6 A Boie of dulloek ecerta a orce of HoN wn a poufh. Jhe 4eld beng ploughed 5m WengHoN u c Wor don îmloughimg e Aend8) iren forte = |Ho N Daplacement 15m o o Hork dene = Fs =lHoX 15 2100 foule. Write an expveuron for the kimetic ane am 0bp2et Ay 6-lonsdee wm sbjpotf mans a Uniom velscity,'u. Aet it de SR usa digamee swhen a uConatantdlplaced moN cts doree F on ?t im the directon of t tiiphceme- - mt. he Hork done , W F he Nosk dene on wbjoet l caude horge im ts velae&ylet ia. velscy charft ror to V. Let a' te V, she acceleatiomroouecl  motiom Als fsom equatiom of v-u - 2as v-u Auo accotlim b Neston Aecmd Jani wf motom Now N - F8 mV-mu 2 f O e bjiet s atatomay im sthe stnat W = mass nm uhe Kinebe ene ofan dject of movimg Hith aveloetky ofSm4 i 25 hat U be knebt enet Ahen t Veloery i dau6lad ? wat ail de lt knebi onp* hen ivelseity Ymereasnd i en velaoy 5 5 ms "Kionebie smeig* = 25jwle As ne KnoH siat k¬.= m veloety dosble dhe kmefe {nen* Become H omes SCanned with CamScannero o k.E = 25X4 = l00  veleot Become ske Hme he k. 6ekomes 4ome K - 25X1 = 225 Deme 1 att of oret P. o01wNatt A lamp Con&ume l000 of eleeseinal ere Ard ny cmdumed 1000 T ime Povee Eneg conaume P l0o watt uDeime aveatovie Aod Avexage powek Total enett consumed otal 4fmt token Hot s sthe Relat on bedveen kwh + Joule ? A &) We kmo +Aot I k = l000 W X 3660 Ikw 600000D 3-6 Xto  Dplacem ent = R A oxce m W m At A ME P.e At - 8 P.e = m Lh- m Ancnsim t euaden o notionm. 2 2 k-E my - m m At -C omg (o) = O Cs Scanned with KE = m Camscanner 2  Me 0 +h ME m odk actft stedl belasr: Renson at the done n tRe m o mot wek gk yu undorstardin o the dun'woókR uma m aomd Art t Yea wOok à dane tkuma whenshe dNim mbecause&he aByr force duwng ANmmt -m and also 0 dispatasom om Adontey s a a doad n saek Ars No, Nort mot dene hest decouse he dis-. laceme and fote Bovk. ane pepenude se each otke ANind mu n t Notkrom Nell Ard 8t Yes No s doneBecoust hee or ce agoim aavty A toen pont Anyn photobsteal. Aay 82 No 9 because or ond diplaaem ent as mot pruent hue. Aan egine ullin CS canned ith Scanner A Yesy wosk done here 8ecaus somt orce pu'ed s pull sthe uim Foed taim ae et dfed n stheAun. noF Ans No, decaue dißhsamen and prce a pruent Rere. A aftba mv oue s Nind on Nind dsplace dhe Snat. A4 Yes Becaune fore. A n o0jet stRksn at a cerbeim angle t sire rourd nove m utveo pav anol das back and 4nal poimts of heround The mital theatk o4 sthe sbject ie on Re same horn -to Lne ha s t t e wosk done SThe force s t h e ubpet she Nort Ant 8 n e Rou an wbjet uword magakve Because force of u9av fee aome dousard the eth tut when dloudnuQAd sthere c9ualpos?tve Nork done so she dodal Nort olone eA As 8 Aeetie eme coweero eat and t ena Cectan orce attima 0n 2ok, maschonges velsely str 5mA 2ans, alelahe sthe lor done By sthe oce S canned with CamScanner  Aols ren ma 2ok SmP vebet = Sm4 2 m Final veloety = As we Kmow tkat Work done oaal doctonte m RE e i=u-on X22 W x5 2-50 Ho WE lofoule A on a tatle. e A oma f loka a t a pomt t e movedßoint 8 3f Re Limeoinna A+8 Aovgontal, khot he Hort olone n sthe av tatrènsl force Explain he bjet anslet and betWeen qeavitahonal orce A 8 Snce dhe angle dlone sthe. daplacement o stReoee she usoek dhe atalonalorce gers m he obpo Sr fallha ohet h e potentil entg ofDoesa fselvoae deerease proeavol sthe Jau o cmieaton of ener? *hy? As As We mD N tAat duur sre fa sthe Botont- enett o otjeet oleskedsus But klmet8ste stat imtseaun so n e oF sthe ad semam same Overal ene f.e "Meckanlal enu CSRo P dou mot olake the auu of tonse vmkon of ene ohe Vakieu emeng sansprmaton C u hen e Meshamical eer oide u comve Ymtb knekt cthen enert o pedal agaim kimeke evett o pedal Cmvert fontd kmeke ene* o ele of mas Hok id Aaked Je t 5m above dthe podoakal net d{ ake et aldaued sen foll Cousm fmek enep when * tolf-wa sol venmas Po toniil enet Ho Ho X8X 5 960 Q8o k- 98o NHat she work done hfoce a sateuPde movin Aound he eoAsh JusY ans We. Ard 8Hen sh satotte akound sthe eastAA olaplaceren op the satlOCN. a sangens P ahe ieulst movigBut she oce f CSCamScanne  tavit sowad sAe centre Re ngle Bebveen fore of gtavit and displaeemen -t 9 per, 96 shonelore Nork. done B gtarit d esA coutai ousehold as consumed 26o uns eneege deeiny a month.. HoW uch ener m joue0 s unt 3.6X lo Enug msumed 250X3.bX 10* 5 3 Xlo 2 5 x 36 Xo' 900 X/ob 9X1o oule Man e Be aplacenent she absence of ant ofon force acthg t objet n Dsus ke question A om Thin sat Atnda Qnd teache AersYes + posble As ywe kmod o t arcee do Neustom seeond Jau, F ma Now P F 0 tRen ma 0 o m We KmoN sat a =0 when ehe Baoly, a Jest e im unifogom omat on sthere fore * proved stkat dtere wu 6 daplaeement whout proe oa A Berson Aods a undde wf Aay ove A tead dane for S0 cmimuns and get treg. tas he Aome Nor mot? ustt yeut ansWe Aay 8) As He oW a t , ort dame Sinee sAere i Fore X diaplacwmert o mo dplhcmernt Norkdent FXo= 0 Work dlone O he3An electhie Aeatee g% Aated 1500 Hon much ent does se gol &9 en Pore- 1500 TTone Powe X Time 5 oo Xlo Soo X lo X 6oXbo 54000o00 51 Xtot pule boject of mas 9'am is novimg Nth a constont veloeit , ' How mueh Nor shoul be done she oect fm oxdes so n brimg the o6ect to Jestl AdWeKmow sthat Nork d»me. ckange. tm k¬ = m 2 -Lonu2 2 2 -o Work oane ned with u leubde she wsat aRqured e be done ste stbp of ISoot movng at a veloes- bomR? dolte Valeiby botm / Veloei omd kimete 2 neg of movn AL=mv b0, /H|2 50o X 5o X50o 6 2o8333 333 Now sek done =arge n timei Enety 208333333-0 208 333 339 3n eaek of he followim a force , F acting em Ls amobject of ms he diiection of olis Blace- m. dhe Jonge -oment u som est sda eadt shasn y Ara. Obeve dhe digtama toeefully and state Nhethee sthe Host. done dhe oroe megatie o ve et. t) CS CamScanner AA Work done d sthe orte n the oluaganm ba 0,erd. 6Hostoöne y sthe sorte n te diaam b6 pate CHosk dame Bu sthe fora im the diegran c megotive. Som? sa sAot the ameleration m an 06ee Sould Be 8eLeven when Aeveral fostes ase údiog Oo 8) te orte act n a hadn a ert oliectiens 4 ger han aceelerabom eAs. Ne tord at- F mA B when F 0 en ma = 0 m 0 the enet Pn twh coniumea n lo kaues fouk devit af pauet 5oon eaer polt on Powe 500W Tme on consumed 4 d devices = 5o0 Ky =2000 o n* Powee X Tme L000 X lo 2OooO 20 t - 4 A fsel aln, obeet eventuly stpu en each sthe qalnd. Vhat tapper o fts knth ene y B % tneti enu wil com veut nto Aound enee and het ene 20 2oes te tbans fe of enengy tokeBlaee t n Pusa Ond al te R move tRe enen* pend go hen tronasor sene wate plaee charge in sone of and Potental eneig* o vock some energy tramket to musculat anerg to sRe Joclt Hall alo edönasy stkere 2 molesd of eneky Decaude Mecfancol nea s tonse eot eneta COuse out ody sen Beceme Rot