Anter
ʻO kaʻaʻano neʻe rectilinear (MRU) He neʻe ia e lawe ʻia ma kahi laina pololei, i ka wikiwiki mau (me ka nui a me ke kuhikuhi mau).
Kapa ʻia ke ala ke ala a kekahi mea e wehewehe ai i ka neʻe ʻana mai kahi kiko a i kahi ʻē aʻe. Hoʻonohonoho ka Physics i nā neʻe e kā lākou ala hele:
Rectilinear. Hana ʻia ia i hoʻokahi wale nō ala.
- Paʻa lole. Kūmau ka wikiwiki, ʻaʻohe o kona holo wikiwiki.
- Hoʻoikaika ʻia. ʻO ka wikiwiki mau, ʻo ia ka mea e hoʻonui a hoʻemi paha ka wikiwiki i kahi ala mau.
Hālawa.
- Pendular. He neʻe oscillatory ia, e like me ke pendulo.
- Pōʻai. Me ke koʻi o ke kaʻapuni a me ka radius mau. ʻO ke ala o ka neʻe e wehewehe ana i ke anapuni.
- Parabolic. Kuhi ke ala o ka mea i kahi parabola.
ʻO ke ʻano o ka neʻe ʻana he mea ia e mau ai kona wikiwiki, ʻaʻole e loli kona wikiwiki. ʻO ka holo wikiwiki ʻole.
ʻO ka wikiwiki kahi mea i wehewehe ʻia e like me ka mamao i huakaʻi ʻia i kahi anakahi o ka manawa. ʻO kahi laʻana: 40 mau kilomika i kēlā me kēia hola ke neʻe nei ke kelepona i 40 mau mile i hoʻokahi hola (40 km / h).
E hoʻomaulia i ka mamao i hele ʻia e kekahi mea me ka neʻe like o ka rectilinear, hoʻohana ʻia kēia ʻikepili: ka wikiwiki a me ka manawa.
Inā ʻike ʻoe i ka mamao a me ka wikiwiki akā makemake ʻoe e helu i ka manawa e lawe ai, e puʻunaue i ka mamao i ka wikiwiki:
d / v = t50 km / 100 km / h = 1/2 h (0.5 h)
Hiki iā ʻoe ke ʻike i ka wikiwiki inā loaʻa iā ʻoe ka ʻike mamao a me ka manawa.
D / t = V50 km / ½ h = 100 km / h
I nā huaʻōlelo ʻē aʻe, nā ʻano o ka neʻe o ka neʻe o ka rectilinear (MRU):
- Ala pololei
- ʻO ka wikiwiki paʻa (ʻaʻahu)
- Hōʻeleu kūnewa
- Kuhikuhi paʻa
- E nānā pū: hāʻule manuahi a hoʻolei kū i luna
Nā laʻana o ka neʻe o ka neʻe o ka rectilinear
- Haʻalele kahi kaʻaahi iā Paris ma 6 a hiki i Lyon ma 8 am. Aia kona ala i kahi laina pololei. ʻO ka mamao ma waena o Gare de Paris a me Gare de Lyon he 400 km. Hele mau ke kaʻaahi i ka wikiwiki like, me ka ʻole o ka wikiwiki a ʻole ke kele a hiki i kona wahi i hele ai. Pehea ka wikiwiki o ke kaʻaahi e holo nei?
Ka mamao: 400 km
Ke anilā: 8 mau hola - 6 mau hola = 2 mau hola
400 km / 2 mau = 200 km / h
Pane: holo ke kaʻaahi ma 200 mau kilomika i kēlā me kēia hola.
- ʻO ke ala mai koʻu hale a ka hale o kaʻu hoaaloha he laina pololei. Ke kipa aku wau iā ia, hoʻokele wau i kaʻu kaʻa i ka wikiwiki o 20 kilomita i kēlā me kēia hola, me ka wikiwiki ʻole a lohi paha a hiki i koʻu hōʻea ʻana i laila. Lawe ʻia iaʻu he hapalua hola e hele ai i laila.
Pehea ka mamao o ka hale o kaʻu hoaaloha?
Wikiwiki: 20 km / h
Ke anilā: 1/2 h
20 km / h / 1/2 h = 10 km
Pane: He ʻumi mau mile ka mamao o ka hale o koʻu hoaaloha.
- Hāʻawi ʻo Juan i nā nūpepa i kona kaiāulu. ʻOiai ʻike ʻo ia i nā helu i ka puʻuwai, hele ʻo ia i kāna paikikala a hele i ke ala me ka kū ʻole ke hōʻea ʻo ia i kēlā me kēia hale, hoʻolei ʻo ia i nā nūpepa mai ke kaʻa. ʻO ke ala o Juan ma ke ala hoʻokahi a pololei, o 2 km. Hele ia i ka wikiwiki o 10 mau mile i kēlā me kēia hola. Pono ʻo Juan e hoʻomaka i ka huakaʻi a hoʻi i ke ala like ma ka wikiwiki like. Inā haʻalele ʻo Juan i kēia manawa, pehea ka lōʻihi o ka hoʻi ʻana?
I kēia hihia aia ʻelua mau neʻe rectilinear like: ʻo ka mea e hele ana a ʻo ka mea i hope.
Wikiwiki: 10 km / h
Ka mamao: 2 km
2 km / 10 km / h = 0.2 h = 12 mau minuke
ʻO kēia helu wale nō no kekahi o nā huakaʻi.
12 minuke x 2 (huakaʻi hele) = 24 mau minuke
Pane: Lawe ʻo Juan i 24 mau minuke e hoʻi.
- I kēlā me kēia kakahiaka holo wau i ʻumi mau kilomika pololei ma kahakai, a lawe iaʻu i hoʻokahi hola. Makemake wau e hoʻomaikaʻi i koʻu wikiwiki e pāʻani i ka heihei kūʻē i kaʻu mea hoʻokūkū, hiki ke holo ma 12 mau kilomita i kēlā me kēia hola. Pehea ka lōʻihi e hana ai wau i kaʻu holo maʻamau e ala ai i ka wikiwiki me kaʻu mea hoʻokūkū?
Wikiwiki: 12 km / h
Ka mamao: 10 km
10 km / 12 km / h = 0.83 h = 50 mau minuke
Pane: Pono wau e hoʻopau i ka papa ma 50 mau minuke e wikiwiki e like me kaʻu mea hoʻokūkū.
- E hoʻomau me: E helu i ka holomua
