Musimboti wesimba rekushanda nemagetsi
Dzidziso yesimba rekushanda-kinetic inoti basa remagetsi kana basa rinoitwa nesimba remagetsi rakaenzana nekuchinja kwesimba remagetsi.
W net = KUTI t – KUTI o = 1⁄2 m(v t 2 – vo 2 )
W net = Kune mhando mbiri dzemasimba, dzinoti simba rekuchengetedza, uye simba risingachengetedze. Saka, basa rekuchengetedza rinogona kutorwa serinoumbwa nebasa rinoitwa nesimba rekuchengetedza uye basa rinoitwa nesimba risingachengetedze.
W c + W nc = ΔKE
Basa rinoitwa nesimba rinochengetedza zvinhu rakaenzana nekuchinja kusina kunaka kwesimba rinogona kuitika:
W c = -ΔPE
– ΔPE + W nc = ΔKE
W nc = ΔPE + ΔKE
Wnc = ΔME
Equation iri pamusoro apa inotaura kuti basa rinoitwa nesimba risingachengetedzi chinhu rakaenzana nekuchinja kwesimba remuchina rechinhu chacho. Simba remuchina = simba rinokwanisa + simba remuchina. Simba rinokwanisa kutora chimiro chesimba regiravhiti kana simba remuchina rinotenderera.
Muenzaniso wemubvunzo: Dzidziso yesimba rebasa-mechanical
Bhokisi re2 kg rinotanga kufamba nekumhanya kwe10 m/s. Nguva pfupi yadarika, bhokisi rinomira. Kukwikwidzana kwekinetic pakati pebhokisi nepasi i0.2. Kukurumidza kwegiravhiti i10 m/s 2 . Kufamba kwebhokisi kwakadii?
Kukurukurirana:
Yakawanikwa: m = 2 kg, v o = 10 m/s, vt = 0, k = 0.2, w = mg = (1 kg)(10 m/s 2 ) = 10 kg m/s 2 = 10 Newtons,
Kubvunzwa: huwandu hwenzvimbo (s) dzebhokisi
Dzidziso yesimba rekushanda nemechanical:
W nc = ΔME
W nc = ΔPE + ΔKE
Kureba (h) kunoramba kuripo kana kuti hapana shanduko pakukwirira, saka hapana shanduko musimba regiravhiti.
Wnc = ΔKE
Basa rinoitwa ne kinetic frictional force nderekuti:
W nc = – f k s = μ k N -s = μ k w -s = μ k mg -s
W nc = – (0.2)(2)(10)(s) = – (4)(s)
Simba rekukweshana rinoita basa rekusashanda zvakanaka (simba rekukweshana rinoita zvakasiyana nekubviswa kwechinhu)
Kuchinja kwesimba rekinetic:
ΔKE = 1⁄2 m (v t 2 – vo 2 ) = 1⁄2 (2)(0 2 – 10 2 ) = (0 – 100) = – 100
Kutamiswa kwechinhu:
W nc = ΔKE
– (4)(s) = – 100
s = – 100 / – 4 = mamita makumi maviri nemashanu
Mibvunzo makumi maviri nemhinduro pamusoro pepfungwa yesimba rekushanda-mechanical:
1. Mubvunzo: Chii chinonzi musimboti wesimba rekushanda nemechanical? Mhinduro: Musimboti wesimba rekushanda nemechanical unoti basa rinoitwa pachinhu rakaenzana nekuchinja kwesimba racho remechanical.
2. Mubvunzo: Basa rinotsanangurwa sei mufizikisi? Mhinduro: Basa rinotsanangurwa sechibereko chesimba rinoshandiswa pachinhu uye daro rarinofamba richienda kune simba.
3. Mubvunzo: Chii chinonzi simba remakanika? Mhinduro: Simba remakanika rinoumbwa nesimba remakanika rechinhu uye simba rinokwanisa kushandiswa.
4. Mubvunzo: Kana pasina masimba asingachengetedze, chii chingataurwa nezvesimba rese remuchina wesystem yakavharwa? Mhinduro: Simba rese remuchina rinoramba riripo.
5. Mubvunzo: Ipa muenzaniso wesimba rinochengetedza zvinhu. Mhinduro: Simba rinokwevera zvinhu pasi muenzaniso wesimba rinochengetedza zvinhu.
6. Mubvunzo: Simba rinogona kumuka rakasiyana sei nesimba rinomuka? Mhinduro: Simba rinogona kumuka isimba rinokonzerwa nenzvimbo, zvakaita sekukwirira pamusoro penyika, nepo simba rinomuka richibva pakufamba.
7. Mubvunzo: Basa rinoitwa nesimba rinochengetedza zvinhu rine hukama hwakadii nesimba rinogona kuitika? Mhinduro: Basa rinoitwa nesimba rinochengetedza zvinhu rakaenzana nekuchinja kusina kunaka kwesimba rinogona kuitika.
9. Mubvunzo: Musimboti wesimba rekushanda neremakanika unotsanangura sei kushandurwa kwesimba rinokwanisa kuita simba remakanika muchinhu chinodonha chiri kudonha? Mhinduro: Sezvo chinhu chichidonha, simba racho rinokwanisa kudonha uye simba racho remakanika rinowedzera nehuwandu hwakaenzana, zvichiita kuti simba rese remakanika rirambe riripo.
10. Mubvunzo: Chii chinoitika kusimba remuchina wehurongwa kana masimba asiri ekuchengetedza, akadai sekukweshana, achishanda pariri? Mhinduro: Simba remuchina rinoderera nekuti masimba asiri ekuchengetedza anobvisa simba, kazhinji sekupisa.
11. Mubvunzo: Simba remuchina remuchina rinogona kuwedzera here? Mhinduro: Ehe, kana basa rekunze raitwa pamuchina.
12. Mubvunzo: Pfungwa yebasa ine chekuita sei nesimba? Mhinduro: Basa inzira iyo simba rinofambiswa kana kushandurwa nayo muhurongwa.
13. Mubvunzo: Kana chinhu chichifamba nespeed isingachinji, chii chingataurwa nezvemambure anoitwa pachiri? Mhinduro: Mambure akaitwa pachiri haana zero nekuti hapana kukurumidza kuri kuitika.
15. Mubvunzo: Sei chitubu chakamanikidzwa chiine simba rinogona kushandiswa? Mhinduro: Kana chitubu chakamanikidzwa, basa rinoitwa pachiri, icho chinochengetwa sesimba rinogona kushandiswa. Simba iri rinogona kuburitswa kana chitubu chasunungurwa.
16. Mubvunzo: Chii chinonzi work-energy theorem? Mhinduro: work-energy theorem inotaura kuti basa rinoitwa pachinhu rakaenzana nekuchinja kwesimba racho rekinetic.
17. Mubvunzo: Simba rine hukama sei nebasa? Mhinduro: Simba chiyero chinoitwa basa kana simba rinotamiswa. Rinoverengerwa seP apo ibasa uye inguva.
18. Mubvunzo: Basa rinogona kuva nemhedzisiro isina kunaka here? Mhinduro: Ehe, basa harina kunaka kana simba negwara rekufamba zvakapesana.
19. Mubvunzo: Kana kona iri pakati pesimba negwara rekufamba iri madhigirii makumi mapfumbamwe, basa rinoitwa sei? Mhinduro: Basa rinoitwa izero nekuti simba harina chikamu chiri munzira yekufamba.
20. Mubvunzo: Muchina uri nyore, semuchina unorerutsa sei basa? Mhinduro: Muchina hauchinje basa rose rinoitwa asi unochinja mashandisirwo anoitwa simba, zvichiita kuti basa rive nyore kana kuti rinoshanda.
Pfungwa yebasa uye musimboti wesimba remakanika zvakakosha mufizikisi uye zvinopa kunzwisisa kwekutanga kwekuti simba rinotamiswa uye rinoshandurwa sei mumasisitimu akasiyana-siyana.
