Mienzaniso miviri yekushandisa mitemo yaNewton kune tambo nepulley load system
1. Huremu hwebhuroko 1 i2 kg, huremu hwebhuroko 2 i3 kg, kumhanya kunokonzerwa negiravhiti i10 m/s2Sarudza (a) hukuru uye divi rekumhanya kwehurongwa (b) hukuru hwesimba rekumanikidza patambo!
Kukurukurirana
Mienzaniso mina yemibvunzo pamusoro pekushandiswa kwemitemo yaNewton pakufamba kwakatwasuka kwechikwidzo kana chiridzi
1. Munhu ane huremu hwe50 kg ari muelevator. Kukurumidza kunokonzerwa negiravhiti = 10 m/s2Sarudza hukuru hwesimba rakajairika rinoitwa nepasi remuchinda pamunhu kana:
(a) elevator isina ruzha
(b) elevator inodzika pasi nespeed isingachinji
(c) elevator inokwira kumusoro nekumhanya kwe5 m/s2
(d) elevator inodzika pasi nekumhanya kwe5 m/s2
(e) elevator yekudonha yakasununguka
Mienzaniso miviri yekushandisa mitemo yaNewton kuti iite seyakatsetseka (isina kukweshana)
1. Huremu hwebhuroko i2 kg, kumhanyisa nekuda kwegiravhiti = 10 m/s2Sarudza (a) simba rinobuda rinokurumidzisa bhokisi (b) hukuru hwekukurumidzisa bhokisi.
Kukurukurirana
Mienzaniso miviri yekushandisa mitemo yaNewton kune mafambiro akakombama (kune kukweshana)
1. Huremu hwebhuroko i2 kg, kumhanyisa nekuda kwegiravhiti = 10 m/s2, chiyero che static ne kinetic friction i0,2 uye 0,1. Chivharo chichiri kufamba here kana kuti chiri kufamba? Kana chivharo chiri kufamba, sarudza (a) simba rinobuda rinokurumidzisa chivharo (b) hukuru uye gwara rekumhanya kwechivharo!
Kukurukurirana
Mutemo wekuchengetedza mwero wakatwasuka inoti kana pasina simba rekunze rinoshanda pazvinhu zviviri zvinosangana, saka tichimhanya chinhu chisati chaitika chakafanana nekufamba kwechinhu mushure mekuitika kwechiitiko.
Information :
m1 = huremu hwechinhu 1, m2 = huremu hwechinhu 2
Zvinhu zveKuroverana zvisina kusimba
Mukubatana kwechikamu che elastic (kusangana kwe elastic zvisina kukwana), mutemo wekuchengetedza momentum unoshanda , nepo mutemo wekuchengetedza kinetic energy usingashande. Munguva yekusangana, rimwe resimba re kinetic rinoshandurwa kuita simba reruzha, simba rekupisa, uye simba remukati. Kushandiswa kweshoko re elastic kunoratidza kuti mushure mekusangana, zvinhu zviviri hazvibatanidzi kuita chimwe kana kunamira pamwe chete, asi panzvimbo pezvo zvinosvetuka. Muenzaniso wekusangana kwe elastic zvisina kukwana kunosangana kwechikamu chimwe chete pakati pemabhuru maviri kana mabhora maviri ebhiriyadhi.
Kusangana pakati pezvinhu kunonzi kuungana kwakanyatsosimba kana simba rekufamba (momentum) nesimba rekufamba (kinetic energy) rechinhu chimwe nechimwe chisati chasangana zvakaenzana nesimba rekufamba (momentum) nesimba rekufamba (kinetic energy) rechinhu chimwe nechimwe mushure mekusangana. Nemamwe mashoko, mukusangana kwakanyatsosimba (elastic collision), mutemo wekuchengetedza simba rekufamba (momentum) nemutemo wekuchengetedza simba rekufamba (kinetic energy) zvinoshanda. Kushandiswa kweshoko rekuti elastic kunoratidza kuti mushure mekusangana, zvinhu zviviri izvi hazvibatanidzi kuita chimwe chete kana kuti hazvinamati pamwe chete asi zvinosvetuka-svetuka.
Mukubatana kwechikamu che elastic (kusangana kwe elastic zvisina kukwana), mutemo wekuchengetedza momentum unoshanda , nepo mutemo wekuchengetedza kinetic energy usingashande. Munguva yekusangana, rimwe resimba re kinetic rinoshandurwa kuita simba reruzha, simba rekupisa, uye simba remukati. Kushandiswa kweshoko re elastic kunoratidza kuti mushure mekusangana, zvinhu zviviri hazvibatanidzi kuita chimwe kana kunamira pamwe chete, asi panzvimbo pezvo zvinosvetuka. Muenzaniso wekusangana kwe elastic zvisina kukwana kunosangana kwechikamu chimwe chete pakati pemabhuru maviri kana mabhora maviri ebhiriyadhi.
1. Huremu (w)
Simba rinokwevera pasi, kana kuti rinowanzo pfupikiswa sehuremu, isimba rinokwevera pasi rinobata chinhu chine huremu. Chiratidzo chesimba rinokwevera pasi ndi w, iro rinomiririra uremu.
Fomura yekuverenga simba rinokwevera pasi inobva pafomura Mutemo wechipiri waNewton :
F = ma
Zvinoshandiswa pakuverenga simba rinokwevera pasi:
w = mg
Mashoko :
F = simba (chikamu chepasi rose = Newton)
w = simba rinokwevera pasi (chikamu chepasi rose = Newton)
m = huremu hwechinhu (mayuniti epasi rose = kg)
kuti = kukurumidza (chikamu chepasi rose = m/s2)
g = kukurumidza nekuda kwesimba rinokwevera pasi (mayuniti epasi rose = m/s2)
1. Tsanangudzo yemaitiro
Simba chinhu chinoita kuti zvinhu zvionekwe kukurumidzaNemamwe mashoko, simba chinhu chinofamba, chinomisa kana kuchinja mafambiro echinhu.
Maitiro acho huwandu hwevector Saka, simba rine hukuru uye gwara. Chiratidzo chesimba ndiF (Simba). F chiratidzo chesimba. Kune mhando dzakasiyana dzesimba, uye haasi marudzi ese esimba ane chiratidzo F. Chikamu chesimba chepasi rose ikg m/s2 anonzi Newton.