Pfungwa dzeKukurumidza uye Kukurumidza
Mukudzidza fizikisi, pfungwa mbiri huru dzinoita basa guru mukunzwisisa mashandiro ezvinhu isimba guru (momentum) nepfungwa dzinoita kuti munhu anzwe zviri kuitika (impulse). Aya mazwi anotsanangura zvinhu zvakasiyana-siyana zvekufamba nemasimba, achibatanidza madotsi ari pakati pemamiriro ekufamba kwechinhu pari zvino uye shanduko dzachinoitika. Kunyange zvazvo simba guru richigona kuonekwa sechimiro chezvinhu zvinofamba, simba guru rinoreva shanduko iri muchimiro ichi nekuda kwemasimba anoshandiswa. Muchinyorwa chino, tichaongorora zvinhu, mashandisirwo, uye zvinorehwa nesimba guru (momentum) nepfungwa dzinoita kuti munhu anzwe zviri kuitika muhupenyu hwake.
Kunzwisisa Kukurumidza
Momentum inhamba yevector inotsanangura kufamba kwechinhu. Pamasvomhu, ichibereko chehukuru hwechinhu uye kumhanya kwacho, zvichipiwa nefomura:
\[ \text{Momentum (p)} = \text{mass (m)} \times \text{velocity (v)} \]
Nekuti velocity inhamba yevector—zvinoreva kuti ine hukuru uye gwara—simba rinogarawo nhaka iyi vector. Nokudaro, chinhu chinofamba kuchamhembe nevelocity yakati chine momentum yakasiyana pane dai chaifamba kumaodzanyemba nespeed imwe chete.
Kukosha kwesimba remagetsi kuri mukuchengetedzwa kwaro mumasisitimu akaparadzana. Zvinoenderana neMutemo weKuchengetedza Simba reMasimba, mukati mesisitimu yakavharwa isina masimba ekunze, simba rese risati raitika uye mushure mekuroverana rinoramba riripo. Nheyo iyi inotibatsira kuongorora nekufanotaura mhedzisiro yekuroverana, ingave iri elastic (uko simba remagetsi rinochengetedzwa) kana inelastic (uko simba remagetsi risingachengetedzwe).
Mienzaniso Inoshanda Yekukurumidza
1. Tsaona dzeMotokari:
Mukuongorora tsaona dzemotokari, kunzwisisa simba remotokari kunobatsira nyanzvi dzezvekuongorora kuti dzigadzirezve zviitiko kuti dzinzwisise masimba enjodzi nekukuvadzwa.
2. Mitambo:
Ingava bhora riri kurohwa netsvimbo yebaseball kana kuti mutambi wenhabvu ari kukava bhora, kufambisa simba kwakakosha pakuona kumhanya kwebhora uye kwarinoenda.
3. Kufamba Muchadenga:
Nheyo dzekuchengetedza simba dzinoshandiswa kana zvitundumuseremusere zvichigadzirisa nzira dzazvo zvichishandisa mathruster kana pakuronga kufamba kwesimba rinokwevera pasi richitenderera mapuraneti.
Nhanganyaya yeImpulse
Kufuridzira kune chekuita nekufuridzira asi kunotarisa pakuchinja kwefudzira kunokonzerwa nesimba rinoshandiswa kwenguva yakati. Kufuridzira kunoyera mhedzisiro yesimba munguva yaro inoshanda, inotsanangurwa nemasvomhu se:
\[ \text{Impulse (J)} = \text{Force (F)} \times \text{time (t)} \]
Sezvo simba ririwo huwandu hwevector, impulse ivector. Mutemo wechipiri wekufamba waNewton unobatanidza impulse ne momentum pamwe chete, uchiti shanduko mu momentum yechinhu yakaenzana ne impulse inoshandiswa kwachiri:
\[ \Delta \text{Momentum (Δp)} = \text{Impulse (J)} \]
Chaizvoizvo, kusundidzira kunogona kushandiswa kunzwisisa kuti simba rinongoerekana raitika, senge kukanda kana kurovera, rinogona sei kuchinja nekukurumidza simba rechinhu. Mumamiriro ezvinhu apo masimba anosiyana nekufamba kwenguva, kusundidzira kunoverengwa sechikamu chesimba panguva imwe chete.
Mienzaniso Yechokwadi Yepfungwa Dzinovhundutsa
1. Zvinhu Zvinochengetedza Mumotokari:
Mota dzemazuva ano dzine nzvimbo dzakakombama uye ma airbag ekushandisa kuti dziwedzere nguva iyo simba rekurovera rinoshanda, nokudaro zvichideredza simba rekurovera rinoonekwa nevanenge vari mumotokari. Nekuwedzera nguva \( \Delta t \), impulse inoita kuti shanduko yekukurumidza yemota itongwe zvakachengeteka.
2. Makanika emitambo:
Vatambi vemitambo yakasiyana-siyana vanoshandisa pfungwa yekukurumidza kusimudzira kugona kwavo. Semuenzaniso, mumhanyi anosunda zvakasimba pamatanho ekutanga kwenguva pfupi, zvichigadzira kukurumidza kukuru kunomusundira mberi.
3. Mitambo yeTenesi neRacket:
Vatambi vanowanzo 'tevera' maswing avo kuti vawedzere nguva yekubata, nokudaro vachishandisa simba guru uye vachitumira simba guru kubhora.
Kubatana Pakati Pekukurumidza uye Kufungidzira
Basa guru rekusimudzira simba uye kutamba kwepfungwa mufizikisi ihwo hukama hwavo hwepedyo hunotsanangurwa nemaequations avo anotsanangura. Iyo impulse-momentum theorem (kana equation) inotsanangura muchidimbu kubatana uku:
\[ \Delta \text{Momentum} = \text{Impulse (J)} \]
Mukutaura kwechokwadi, izvi zvinoreva kuti chero shanduko musimba rechinhu inokonzerwa nepfungwa yachinosangana nayo. Kubatana uku kunonyanya kubatsira mumatambudziko efizikisi anosanganisira kuroverana kana mamiriro ezvinhu apo masimba asingagari asi anosiyana nekufamba kwenguva. Uyezve, zvinopinda mukunzwisisa misimboti yakaoma senge angular momentum, iyo inodzora kufamba kwese.
Mitemo Yekuchengetedza uye Kubonderana
Muzviitiko zvakawanda zvepanyama, mitemo yekuchengetedza inopa zvishandiso zvine simba zvekufanotaura. Kuchengetedza simba remutsara kwakakosha zvikuru. Munguva yekuroverana, simba rese rezvinhu zvinoroverana pamberi uye mushure mechiitiko rinofanira kuenzana chero bedzi pasina simba rekunze rinoita pane system. Nheyo iyi inoonekwa mu:
1. Mabhiriyadhi:
Kana bhora rechiratidzo rikarova rimwe bhora, simba rinofambiswa, uye nekutarisa nzira dzebhora mushure mekuroverana, tinogona kusimbisa mutemo wekuchengetedza.
2. Fizikisi yezvemuchadenga:
Muzviitiko zvemuchadenga zvakaita sekuumbwa kwenyeredzi kana kuroverana kwemapoka enyeredzi, kuchengetedza simba rekufamba kunobatsira masayendisiti kufanotaura nekunzwisisa maitiro emuchadenga.
Kufurirwa muZviitiko Zvisingagari Zvine Simba
Patinenge tichibata nemasimba akasiyana-siyana akadai sekufamba kwemitambo kana kupusha injini zvinoshanduka, chimiro chakakosha chepfungwa chinova chakakosha. Pano tinoshandisa calculus kupfupikisa kuchinja-chinja kwemasimba panguva yekubata, zvichiverengerwa seizvi:
\[ \text{Impulse (J)} = \int_{t_0}^{t_1} F(t) \, dt \]
Kunzwisisa uku kwakakosha pakugadzira mapurofayiri anoshanda esimba-nguva muinjiniya, sainzi yemitambo, uye sainzi yezvinhu uko masimba anoshanduka anoshandiswa.
mhedziso
Momentum ne impulse ndidzo pfungwa dzinotsigira zvakawanda zvemakanika ekare. Momentum inotsanangura hunhu hwekufamba kwechinhu, nepo impulse inotsanangura simba remasimba nekufamba kwenguva, zvakabatana zvakananga nekuchinja kwe momentum. Nheyo dzekuchengetedza momentum ne impulse hadzisi dzekudzidzisa chete asiwo dzinoshanda munzvimbo dzese dzepasirese. Kubva pakugadzira mota dzakachengeteka kusvika pakuvandudza mashandiro emitambo, idzi nheyo dzinopa ruzivo rwakakosha uye maturusi ekunzwisisa nekufanotaura maitiro ekufamba kwezvinhu muzvikamu zvakasiyana. Kuburikidza nepfungwa uye ma lenses anoshanda, momentum ne impulse zvinoramba zvichikosha mukusimudzira kunzwisisa kwedu kwesimba remuviri.
