Mea Neʻe Hāʻule Manuahi
I ka wā ma mua, ka neʻe ʻana o nā mea hāʻule He kumuhana hoihoi loa ka hāʻule ʻana i ka honua i loko o ke akeakamai kūlohelohe. Ua ʻōlelo mua ke akeakamai ʻo Aristotle e hāʻule wikiwiki ana nā mea me ke kaumaha nui ma mua o nā mea māmā. Ua hoʻohuli ka manaʻo o Aristotle i nā manaʻo o ka poʻe i noho ma mua o Galileo, ka poʻe i manaʻoʻiʻo e hāʻule wikiwiki ana nā mea me ke kaumaha nui ma mua o nā mea māmā a ʻo ka wikiwiki o ka hāʻule ʻana o kahi mea e pili ana i kona kaumaha. Malia paha ma mua o ke aʻo ʻana i kēia kumuhana, ua manaʻo pū ʻoe i ka mea like.
E hoʻokuʻu i kahi ʻāpana pepa a me kahi puke mai ke kiʻekiʻe like. E kau i ka pepa ma kou poho lima hema a me ka puke ma kou poho lima ʻākau. Ma hope o ka hāʻule ʻana, paʻi mua ka puke i ka papahele, ʻoiai e paʻi ka pepa i ka papahele ma hope. I kēia manawa, e ho'āʻo e kau i ka pepa ma luna o ka puke, a laila e hoʻokuʻu i ka pepa a me ka puke i ka papahele. I kēia manawa, ua paʻi like ka pepa a me ka puke i ka papahele.
Ua ʻōlelo ʻia kahi mea e hāʻule manuahi ana inā neʻe pololei ia i ke kikowaena o ka Honua a loaʻa iā ia ka wikiwiki o ka umekaumaha mau i kona neʻe ʻana. Inā hāʻule manuahi ia kokoke i ka ʻili o ka Honua, loaʻa i ka mea ka wikiwiki o ka umekaumaha mau o 9,8 m/s.2 a ʻo ke kuhikuhi o ka wikiwiki o ka umekaumaha e kū pono ana i ke kikowaena o ka Honua (kūlike i ka ʻili o ka Honua). No ka hoʻomaʻalahi ʻana i nā helu i hana ʻia e nā haumāna e aʻo ana, ua hoʻopuni ʻia ʻo g i 10 m/s2.
ʻEkolu mau kūlana like ʻole, e like me:
1. Neʻe pololei ka mea i lalo me ka ʻole o ka wikiwiki mua (ʻaʻohe v)o). Eia kekahi laʻana, hāʻule kahi hua mai kahi lāʻau ma hope o ka hoʻokaʻawale ʻia ʻana mai kona kumu. ʻO ke kuhikuhi o ka neʻe ʻana e iho mau ana i lalo a ʻike ka mea i ka wikiwiki, no laila he maikaʻi mau ka wikiwiki o ka umekaumaha (g). Ma kekahi mau puke physics ua kapa ʻia ʻo ia neʻe hāʻule manuahi
2. Neʻe pololei ka mea i lalo me kahi wikiwiki mua (aia ʻo vo). Eia kekahi laʻana, ua kiola ʻia kahi pōhaku i lalo. ʻO ke kuhikuhi o ka neʻe ʻana e iho mau ana i lalo a ʻike ka mea i ka wikiwiki, no laila he maikaʻi mau ʻo g. Ma kekahi mau puke physics ua kapa ʻia ʻo ia neʻe kū pololei i lalo.
3. Neʻe pololei kahi mea i luna me kahi wikiwiki mua. Ma hope o ka hiki ʻana i kona kiʻekiʻe loa, neʻe hou ka mea i lalo. No ka laʻana, hoʻolei pololei ʻoe i kahi kinikini i luna a laila hopu hou iā ia i kona neʻe ʻana i lalo. Ke neʻe i luna, ʻike ka mea i ka deceleration (g maikaʻi ʻole), ke neʻe i lalo, ʻike ka mea i ka wikiwiki (g maikaʻi). Ma kekahi mau puke aʻo physics, ua kapa ʻia kēia neʻe kū pololei i luna.
Pono e hoʻomaopopo ʻia inā ʻike kahi mea i kekahi o nā kūlana ʻekolu i luna, ua ʻōlelo ʻia ua hāʻule manuahi ka mea.
Formula Neʻe Hāʻule Manuahi
ʻO ka neʻe hāʻule manuahi kahi laʻana o ka neʻe linear e loli like ana, no laila ʻo ke ʻano no ka neʻe hāʻule manuahi ua like ia me ke ʻano no ka neʻe linear e loli like ana a ua hoʻoponopono ʻia i nā kūlana o ka neʻe hāʻule manuahi.
ʻIkepili:
h = ke kiʻekiʻe (mika), vo = ka wikiwiki mua (mika/kekona), vt = ka wikiwiki hope loa (mika/kekona), t = ka manawa (kekona), g = ka wikiwiki ma muli o ke koʻikoʻi (mika/kekona)2) = 9,8 m/s2 a i ʻole 10 m/s2.
Ka wikiwiki o ka umekaumaha mau o 10 m/s2 (g maikaʻi - neʻe ka mea i lalo), ʻo ia hoʻi, piʻi ka wikiwiki o ka mea ma 10 m/s i kēlā me kēia 1 kekona. 2 kekona ma hope mai, lilo ka wikiwiki o ka mea i 20 m/s, 3 kekona ma hope mai lilo ka wikiwiki o ka mea i 30 m/s. ʻO ka hoʻēmi mau ʻana o ka umekaumaha he 10 m/s2 (he maikaʻi ʻole ʻo g, neʻe ka mea i luna) ʻo ia hoʻi ke emi nei ka wikiwiki o ka mea ma 10 m/s2 i kēlā me kēia 1 kekona. 2 kekona ma hope mai, emi ka wikiwiki o ka mea ma 20 m/s. 3 kekona ma hope mai, emi ka wikiwiki o ka mea ma 30 m/s.
ʻO ka wikiwiki mau a i ʻole ka hoʻēmi ʻana o ka wikiwiki e hana wale ʻia ma kahi kokoke i ka ʻili o ka Honua. Ma ke kumuhana Ke kānāwai o ka umekaumaha o Newton, e aʻo ʻoe e emi ana ka waiwai o g me ka huinahā o ka mamao.
Nā haumāna laʻana o ka neʻe hāʻule manuahi , laʻana o ka neʻe ʻana i lalo i luna a hiki laʻana o ka neʻe ʻana i luna i hiki iā ʻoe ke hoʻomaopopo maikaʻi i ke kumuhana e pili ana i ka neʻe ʻana o ka hāʻule manuahi.
