Mafunso 8 okhudza kuyenda molunjika
1. Samalani ndi mawu otsatirawa!
1. Oyenda pansi akudutsa pa msewu wodutsa mbidzi
2. Mphaka anathamangira mbewa
3. Mango okhwima akugwa kuchokera mumtengo
4. Mpira wa tenisi umaponyedwa pa ndege yopendekeka
Mawu omwe ali pamwambapa omwe akuphatikizapo kuyenda kolunjika kothamanga (GLBB) ndi...
A. 1 ndi 2
B. 1 ndi 3
C. 2 ndi 4
D. 3 ndi 4
Zokambirana
Kuyenda kolunjika kofulumira (GLBB) ndi kuyenda kothamanga kosalekeza. Mwachitsanzo, poyamba chinthucho chimakhala chete, pambuyo pa sekondi imodzi chinthucho chimayenda ndi liwiro la 1 m/s, pambuyo pa masekondi awiri chinthucho chimayenda ndi liwiro la 2 m/s, pambuyo pa masekondi atatu chinthucho chimayenda ndi liwiro la 3 m/s. Choncho liwiro la chinthucho limawonjezeka ndi 1 m/s pa sekondi imodzi kapena chinthucho chimakumana ndi kuthamanga kwa 1 m/s . Zitsanzo za kuyenda kolunjika kofulumira ndi mango wokhwima womwe ukugwa kuchokera mumtengo ndi mpira wa tenisi womwe ukuponyedwa pa mtunda wopendekera.
Mango wokhwima akagwa kuchokera mumtengo amakumana ndi kuyenda komasuka kogwa ndi mphamvu yokoka ya 9,8 m/s2 . Izi zikutanthauza kuti pambuyo pa sekondi imodzi, liwiro la mango limawonjezeka ndi 9,8 m/s pa sekondi imodzi. Pambuyo pa sekondi imodzi yogwa, liwiro la mango limakhala 9,8 m/s, pambuyo pa masekondi awiri yogwa liwiro la mango limakhala 2 x 9,8 m/s = 19,6 m/s, ndi zina zotero.
Mpira wa tenisi womwe umayikidwa pa ndege yopendekeka umakumananso ndi kuyenda kosinthasintha kwa mphamvu yokoka, koma mphamvu yake ndi yochepera 9,8 m/s chifukwa imadaliranso ndi kutsetsereka kwa bolodi.
Yankho lolondola ndi D.
2. Zotsatira za tickertimer typing kuchokera ku mayendedwe oyesera! Kuyenda kofanana kwa mzere ndi kuyenda kofanana kwa mzere zikuwonetsedwa motsatana mu nambala ya chithunzi...
A. 1 ndi 2
B. 1 ndi 4
C. 2 ndi 3
D. 3 ndi 4
Zokambirana
Tickertimer imapanga mfundo imodzi sekondi iliyonse kuti kuchokera pa mfundo imodzi kupita ku ina zimatenga nthawi yofanana, yomwe ndi sekondi imodzi.
Ngati mtunda pakati pa mfundo iliyonse nthawi zonse ndi wofanana ndiye kuti liwiro la chinthucho ndi losasintha (kuyenda molunjika kofanana).
Ngati mtunda pakati pa mfundo iliyonse uli pafupi, liwiro la chinthucho limakhala lochepa (kusintha kolunjika kofanana kumachepetsedwa).
Ngati mtunda pakati pa mfundo iliyonse uli patsogolo, liwiro la chinthucho ndi lalikulu (kuyenda kofulumira kofanana)
Kutengera chithunzi ndi kufotokozera pamwambapa, tinganene kuti:
Chithunzi 1: Kuyenda molunjika kofanana
Chithunzi 2: Kuyenda kolunjika kothamanga mofanana
Chithunzi 3: Kuyenda kolunjika kothamanga komanso kotsika mofanana
Chithunzi 4: Kuyenda kolunjika kothamanga mofanana
Kotero, kuyenda kolunjika kofanana kwawonetsedwa pachithunzi 1 ndipo kuyenda kolunjika kofulumira kofanana kwawonetsedwa pachithunzi 4.
Yankho lolondola ndi B.
3. Samalani zotsatira za ticker timer kuchokera ku kuyesera komwe kuli pansipa! Ndi iti yomwe ili yoyenda molunjika mothamanga mofanana?
Zokambirana
Tickertimer imapanga mfundo imodzi sekondi iliyonse kotero kuti kuchokera pa mfundo imodzi kupita ku ina imatenga nthawi yofanana, yomwe ndi sekondi imodzi.
Ngati mtunda pakati pa mfundo iliyonse nthawi zonse ndi wofanana ndiye kuti liwiro la chinthucho ndi losasintha (kuyenda molunjika kofanana).
Ngati mtunda pakati pa mfundo iliyonse uli pafupi, liwiro la chinthucho limakhala lochepa (kusintha kolunjika kofanana kumachepetsedwa).
Ngati mtunda pakati pa mfundo iliyonse uli patsogolo, liwiro la chinthucho ndi lalikulu (kuyenda kofulumira kofanana)
Kutengera chithunzi ndi kufotokozera pamwambapa, tinganene kuti:
Chithunzi A: Kuyenda kolunjika kothamanga mofanana
Chithunzi B: Kuyenda kolunjika kothamanga mofanana kumachedwetsedwa, kenako kumafulumizitsidwa.
Chithunzi C: Kuyenda kolunjika kothamanga mofanana
Chithunzi D: Kuyenda molunjika kofanana
Yankho lolondola ndi A.
4. Mwana akuthamanga patsogolo pamsewu monga momwe chithunzi chotsatirachi chikusonyezera osayendetsa njinga yake.
Mtundu wa kuyenda kolunjika kofulumira (GLBB) komwe kumachitika pa njinga ikadutsa panjira ...
Zokambirana
AB = Njinga imatsetsereka osati chifukwa chakuti imayendetsedwa koma chifukwa chakuti imathamanga nthawi zonse. Njinga imathamanga nthawi zonse chifukwa cha mphamvu yokoka, zomwe zikutanthauza kuti liwiro lake limawonjezeka nthawi zonse chifukwa cha mphamvu yokoka yomwe imakokera pansi. Chifukwa chake kuyenda uku ndi chitsanzo cha kuyenda kolunjika kofanana (GLBB).
CD = Ikasuntha kuchokera ku C kupita ku D, njinga imakumana ndi kutsika kwa mphamvu yokoka kosalekeza. Kutsika kwa mphamvu yokoka kosalekeza kumatanthauza kuti liwiro la njinga limachepa nthawi zonse chifukwa cha mphamvu yokoka yomwe imakokera pansi. Chifukwa chake kuyenda uku ndi chitsanzo cha kuyenda kolunjika kofulumira (GLBB) komwe kumachepa.
Yankho lolondola ndi D.
5. Chithunzi chomwe chikuwonetsa ubale pakati pa mtunda ndi nthawi mukuyenda molunjika kofanana ndi...
Zokambirana
Kufotokozera kwa graph: s = mtunda, t = nthawi
Yankho lolondola ndi A.
6. Chinthu chimayenda mamita 60 mu mphindi 5. Werengani liwiro la chinthucho mu International System of Units!
Zokambirana
Amadziwika kuti:
Dongosolo Lapadziko Lonse la Ma Units a nthawi ndi masekondi, osati mphindi, motero mphindi zimasinthidwa kukhala masekondi.
Nthawi yopuma (t) = mphindi 5 = 5 (masekondi 60) = masekondi 300
Mtunda (ma) = mamita 60
Anafunsa: Liwiro (v)
Yankho:
Fomula ya liwiro:
v = s / t
v = mamita 60 / masekondi 300
v = 0,2 mamita/sekondi
Kotero liwiro la chinthucho mu International System of Units ndi 0,2 mita/sekondi. Mita ndi International System of Units yosonyeza mtunda, pomwe yachiwiri ndi International System of Units yosonyeza nthawi.
7. Izi ndi njira yoyendera molunjika mothamanga mofanana...
A. sitima yoyenda
B. galimoto yoyimitsidwa
C. anthu omwe akupitiliza kuthamanga
D. kokonati zomwe zimagwa kuchokera kumitengo
Zokambirana
Kuyenda kolunjika kofanana ndi kuyenda komwe kumakhala ndi njira yokhazikika kotero kuti njira yoyendayo ikhale yowongoka ndipo liwiro la chinthucho likuwonjezeka pang'onopang'ono. Mwachitsanzo, liwiro la chinthucho limawonjezeka ndi mamita awiri/sekondi iliyonse sekondi imodzi, kenako pambuyo pa masekondi awiri, liwiro la chinthucho limakhala 4 m/s, pambuyo pa masekondi atatu liwiro la chinthucho limakhala 6 m/s ndi zina zotero. Pankhaniyi, chinthucho chimanenedwa kuti chimathamanga nthawi zonse ndi 2 m/s pa sekondi imodzi kapena 2 m/s 2.
A. Sitima yoyenda imakhala ndi liwiro ndi njira yosinthira kotero kuti siimaphatikizapo kuyenda kolunjika kofanana
B. Galimoto yoyimitsidwa siikuonedwa kuti ikuyenda chifukwa galimotoyo siimaima.
C. Anthu omwe amathamanga mosasunthika, ngati ali ndi njira yokhazikika komanso liwiro lokhazikika, ndiye kuti amayenda mozungulira mofanana.
D. Chipatso cha kokonati chomwe chimagwa kuchokera mumtengo chimakhala ndi njira yokhazikika ndipo liwiro lake limawonjezeka nthawi zonse chifukwa cha kuthamanga kwa mphamvu yokoka ya 9,8 m/s 2 . Izi zikutanthauza kuti liwiro la kokonati limawonjezeka ndi 9,8 m/s sekondi iliyonse, pambuyo pa masekondi awiri liwiro la kokonati limakhala 19,6 m/s, pambuyo pa masekondi atatu liwiro la kokonati limakhala 29,4 m/s, ndi zina zotero.
Yankho lolondola ndi D.
8. Samalani zochitika zotsatirazi pa moyo watsiku ndi tsiku!
1. Mpira wogubuduzika pansi wopendekeka komanso woterera
2. Munthu amakwera njinga pansi pa phiri popanda kupalasa njinga.
3. Mpira wa baseball umaponyedwa molunjika mmwamba mpaka utafika pachimake.
4. Mpira wa ping pong umagubuduzika pamchenga
Chochitika ichi, chomwe ndi chitsanzo cha GLBB yofulumira, chikuwonetsedwa ndi nambala…..
A. (1) ndi (2)
B. (1) ndi (3)
C. (2) ndi (4)
D. (3) ndi (4)
Zokambirana
1. Mpira wogubuduzika pansi wopendekeka komanso woterera
Ichi ndi chitsanzo cha kuyenda kolunjika kofulumira mofanana, komwe mpira umagubuduzika pansi chifukwa cha kuthamanga kosalekeza kwa mphamvu yokoka.
2. Munthu amakwera njinga pansi pa phiri popanda kupalasa njinga.
Ichi ndi chitsanzo cha kuyenda kolunjika kofulumira mofanana, komwe njinga imasunthira pansi chifukwa cha kuthamanga kosalekeza kwa mphamvu yokoka.
3. Mpira wa baseball umaponyedwa molunjika mmwamba mpaka utafika pachimake.
Ichi ndi chitsanzo cha kuyenda molunjika mmwamba, komwe mpira umakumana ndi kutsika kwa mphamvu yokoka nthawi zonse. Kutsika kumeneku (kuchepa kwa liwiro) kumapangitsa mpirawo kuyima pamalo ake apamwamba kwambiri usanabwerere padziko lapansi.
4. Mpira wa ping pong umagubuduzika pamchenga
Ichi si chitsanzo cha kuyenda kofulumira kofanana kwa mzere.
Yankho lolondola ndi A.
