Masimba Anokakavadzana Asina Kusimba uye Kinetic
Kukweshana ndeimwe yemasimba akajairika asi anowanzo regeredzwa muhupenyu hwezuva nezuva. Mhando mbiri huru dzekukweshana dzatinowanzo sangana nadzo ndedzekukweshana kusingachinji uye kukweshana kusingachinji. Mhando dzose dzekweshana dzinoita basa rakakosha muhupenyu hwakasiyana-siyana, kubva pakufamba netsoka kusvika pakutyaira mota.
Kunzwisisa Simba reKukakavadzana
Tisati tanyatsoongorora kukweshana kwesimba (static friction) ne "kinetic friction", ngatitangei tanzwisisa kuti chii chinonzi "friction". Kukweshana isimba rinoshanda pakati pezvinhu zviviri zvinosangana uye rinoedza kudzivirira kufamba kwazvo. Simba iri rinogona kupatsanurwa kuita mhando mbiri huru: kukweshana kwesimba (static friction) ne "kinetic friction".
Simba Risingachinji reKukweshana
Kukweshana kwakasimba (static friction) isimba rinodzivisa nzvimbo mbiri dziri kusangana kufamba kana simba rekunze richiedza kudzifambisa. Nemamwe mashoko, simba iri rinoshanda kana chinhu chakamira uye chichiedza kutanga kufamba.
Semuenzaniso, ngatitii waisa bhuku patafura woedza kurisunda. Pakutanga, bhuku harizofambi kunyangwe ukaisa kumanikidzwa. Izvi zvinodaro nekuti simba rekukweshana riri pakati pebhuku nepamusoro petafura rinoramba kufamba kwaro. Simba rekukweshana rinoramba richikwira sezvaunoisa simba kusvika pane imwe nzvimbo. Pakupedzisira, kana simba raunoshandisa rakakura zvakakwana kuti rikunde simba guru rekukweshana, bhuku racho rinotanga kufamba.
Equation inoshandiswa kuverenga simba guru rekukweshana kwesimba rinomira ndeiyi:
\[ f_s \leq \mu_s N \]
Dimana:
– \( f_s \) isimba rekukweshana risingachinji.
– \( \mu_s \) i coefficient ye static friction iyo iri empirical value zvichienderana ne peya yenzvimbo dziri kusangana.
– \( N \) isimba rakajairika rinoshanda rakatarisa pamusoro pechinhu chinobata (kazhinji uku ndiko huremu hwechinhu kana pamusoro pacho pakatwasuka).
Kinetic Friction Force
Kana chinhu chatanga kufamba, simba rinotanga kushanda iKinetic friction. Kusiyana nekukakavara kwakagadzika, Kinetic friction inoshanda kana nzvimbo mbiri dzinobatana dzichifamba dzichienderana.
Kana bhuku rakambosundirwa rikatanga kufamba, simba rekukweshana rinoshanda ndiro kinetic friction. Izvi zvinowanzova zvidiki pane simba guru rekukweshana rakasangana naro bhuku risati ratanga kufamba. Kufanana nekukweshana kwakakombama, kukweshana kwakakombama kunoverengerwawo uchishandisa coefficient inoenderana nepeji mbiri dzenzvimbo dziri kusangana. Equation yekinetic friction ndeiyi:
\[ f_k = \mu_k N \]
Dimana:
– \( f_k \) isimba rekukweshana kwekinetic.
– \( \mu_k \) ndiyo coefficient ye kinetic friction.
– \( N \) isimba rakajairika.
Musiyano uripo pakati peStatic neKinetic Friction Force
Musiyano mukuru uripo pakati pe static friction ne kinetic friction inguva yazvinoita basa razvo uye hukuru hwazvo. Static friction inoshanda kana chinhu chakamira uye ichidzivirira kuti chisatange kufamba, ukuwo kinetic friction inoshanda kana chinhu chatove kufamba.
Simba guru rekukweshana rinogara riripo rinowanzova guru pane simba rekukweshana rinoita serinotenderera. Izvi zvinoreva kuti zvakaoma kutanga chinhu chichifamba pane kuramba chichifamba. Semuenzaniso, zvinoda kushanda nesimba kutanga kabhineti hombe pane kuisunda kana yatove kufamba.
Zvinhu Zvinokanganisa Simba reKukakavadzana
Pane zvinhu zvakawanda zvinopesvedzera hukuru hwekusagadzikana uye kinetic friction, zvinosanganisira:
1. Rudzi rwezvinhu zviri pamusoro: Musanganiswa wakasiyana wezvinhu uchava nema coefficients akasiyana ekukweshana. Semuenzaniso, rabha iri paasphalt ine coefficient yakakwira yekukweshana kupfuura chando chiri pasimbi.
2. Kukweshana Kwepamusoro: Nzvimbo dzakakweshana dzinowanzova nekukweshana kwakanyanya kupfuura nzvimbo dzakatsetseka. Saka, kukweshana mumugwagwa une matombo kwakakura kupfuura mumugwagwa weasphalt wakatsetseka.
3. Simba Rakajairika: Simba rakajairika isimba rinoita basa rakatarisa panzvimbo inogunzva. Simba rakajairika parinokura, simba rekukweshana rinobuda rinowedzerawo. Simba iri rakajairika rinowanzoenzana nehuremu hwechinhu kana chinhu chiri panzvimbo yakatambanuka.
4. Kuvapo Kwemafuta Anonhuwirira: Mafuta anonhuwirira akadai semafuta anogona kuderedza kukweshana nekuzadza mipata midiki munzvimbo uye kuparadzanisa nzvimbo mbiri dzinobata. Izvi zvinogona kuderedza zvakanyanya coefficient yekukweshana.
Mashandisirwo muHupenyu hweZuva Nezuva
1. Kumira Kwemota: Kukwizana pakati pematairi nemugwagwa kwakakosha pakumisa mota. Kukwizana kwakanyanya kunoreva kuti mota inogona kumira nekukurumidza kana mabhureki akabatwa. Ndokusaka mamiriro emugwagwa ane mvura kana kuti anotsvedza aine njodzi, sezvo anoderedza kukwizana pakati pematairi nemugwagwa.
2. Kufamba kana Kumhanya: Kugona kwedu kufamba kana kumhanya kunokonzerwa nekukweshana kweshangu dzedu nepasi. Pasina kukweshana uku, hatizokwanisi kuwana simba rinodiwa kuti tifambire mberi.
3. Kutakurwa Kwezvinhu Zvine Midziyo: Mumaindasitiri, kukweshana kunokanganisa mashandiro emuchina nemidziyo yekufambisa. Mafuta anowanzo shandiswa kuderedza kukweshana uye kuwedzera mashandiro.
4. Kukwira Gomo: Shangu dzekukwira dzinowanzogadzirwa netsoka dzinopa kukweshana kwakanyanya kudzivirira kutsvedza pakukwira.
Mhedziso
Kukweshana, kwese kuri kwekusagadzikana uye kwekufamba kwenguva, chikamu chakakosha chehupenyu hwedu hwezuva nezuva. Kunzwisisa mutsauko uye hunhu hwemhando mbiri idzi dzekukweshana hakungokoshi chete mufizikisi asiwo mumabasa akasiyana-siyana anoshanda. Kubva pakumisa mota kusvika pakukwira gomo, kukweshana kunoita basa risingatsiviwi. Nekunzwisisa zviri nani simba iri, tinogona kugadzira magadzirirwo nematekinoroji anoshanda uye akachengeteka, zvichiita kuti hupenyu huve nyore uye huve nyore.
