Ikehu Kinetic

Anter

• Ka ʻokoʻa ma waena o ka ikehu kinetic a me ka ikehu hiki
• Kumuhana helu helu ikehu ikehu
• Nā hana hoʻoikaika kino Kinetic
• Nā laʻana o ka ikehu kinetic
• Nā ʻano ikehu ʻē aʻe

ʻO ka Ikehu Kinetic ʻO ia ka mea i loaʻa i ke kino ma muli o kāna neʻe a wehewehe ʻia e like me ka nui o ka hana e pono ai e hoʻonui i ke kino i ka hoʻomaha a me kahi nui i hāʻawi ʻia i kahi wikiwiki i hoʻonohonoho ʻia.

ʻ Saidlelo ikehu Loaʻa iā ia ma o ka holomua, a ma hope e mālama ka mea i like a hiki i ka loli o ka wikiwiki (hoʻonui a hoʻolōʻihi paha) no laila, e hoʻokū, e lawe ia i ka hana maikaʻi ʻole o ka nui e like me kona ikehu kinetic i hōʻiliʻili ʻia. No laila, ʻo ka lōʻihi o ka manawa e hana ai ka ikaika mua i ke kino e neʻe nei, ʻo ka nui o ka wikiwiki i hiki a ʻoi aku ka nui o ka ikehu kinetic i loaʻa.

Ka ʻokoʻa ma waena o ka ikehu kinetic a me ka ikehu hiki

ʻO ka ikehu kinetic, me ka ikehu hiki, hoʻohui ʻia i ka huina o ka ikehu mīkini (E_m = ʻE_c + E._p). ʻO kēia mau ala ʻelua o ikehu mīkini, kinetics a me nā hiki, ʻike ʻia lākou i ka hopena o ka nui o ka ikehu e pili ana i ke kūlana i noho ʻia e kahi mea i ka hoʻomaha a hiki ke lilo i ʻekolu mau ʻano:

• Ikehu hiki wale nō Gravitational. Aia ia i ke kiʻekiʻe o ke kau ʻia o nā mea a me ka hoʻokalakupua e kau ʻia ma luna o lākou e ka umekaumaha.
• Ikehu hiki ke hiki. ʻO ia ka mea e kū mai ke kiʻi hou kahi mea elastis i kona kinona kumu, e like me ka puna ke decompressed ia.
• Ikehu hiki uila. ʻO ia ka mea i loko o ka hana i hoʻokō ʻia e kahi māla uila kikoʻī, ke hoʻoili ʻia kahi uila i loko ona e neʻe ana mai kahi kiko i ke kahua a hiki i ka pau ʻole.

E nānā pū: Nā laʻana o ka ikehu hiki

Kumuhana helu helu ikehu ikehu

Hōʻike ka ikehu kinetic e ka hōʻailona E_c (kekahi manawa ʻo E_– a i ʻole E₊ a i ʻole T a K) a me kāna ʻano helu maʻamau i A ME_c = ½. m v²kahi m e hōʻike ai i ka nuipa (i Kg) a v e hōʻike ana i ka wikiwiki (i ka m / s). ʻO ka anakahi o ke ana no ka ikehu kinetic ʻo Joules (J): 1 J = 1 kg. m²/ s².

Hāʻawi ʻia i kahi ʻōnaehana hoʻohui Cartesian, e loaʻa i ka form kinipona kinetic kinetic ka palapala aʻe: A ME_c= ½. m (ʻ² + ẏ² + ¿²)

Hoʻololi kēia mau formulated i nā mīkini relativistic a me nā mechanics nui.

Nā hana hoʻoikaika kino Kinetic

1. Hele kahi kaʻa 860kg ma 50 km / h. He aha ka ikehu e neʻe ai?

Hoʻololi mua mākou i ka 50 km / h i m / s = 13.9 m / s a ​​hoʻopili i ka helu helu

A ME_c = ½. 860 kg. (13.9 m / s)² = 83,000 J.

1. ʻO kahi pōhaku me ka nui o 1500 Kg e ʻōwili i lalo o kahi pali me ka hōʻiliʻili ʻana i kahi ikehu kinetic o 675000 J. I ka wikiwiki hea e neʻe ai ka pōhaku?

ʻOiai Ec = ½. m .v² Loaʻa iā mākou 675000 J = ½. 1500 Kg. v², a ke hoʻoholo nei i ka mea ʻike ʻole ʻia, pono mākou e v² = 675000 J. 2/1500 Kg. 1, nohea v² = 1350000 J / 1500 Kg = 900 m / s, a ʻo ka hope loa: v = 30 m / s ma hope o ka hoʻonā ʻana i ke aʻa huinahā o 900.

Nā laʻana o ka ikehu kinetic

1. He kāne ma ka papa skateboard. ʻO kahi skateboarder ma ka pōhaku U e ʻike i ka ikehu hiki ke hiki (ke kū i kona mau wēlau no kahi manawa koke) a me ka ikehu kinetic (ke hoʻomaka hou i ka neʻe i lalo a i luna). ʻO kahi skateboarder me ka nui o ke kino e loaʻa iā ia ka ikehu kinetic i ʻoi aku, akā ʻo ka mea nona ka skateboard e ʻae iā ia e hele i nā wikiwiki kiʻekiʻe.
2. ʻO kahi ipu porcelain i hāʻule. Ke hana nei ka umekaumaha ma ka vas porcelain tripped i kuhi hewa ʻia, kūkulu ʻia ka ikehu kinetic i loko o kou kino i kona iho ʻana a hoʻokuʻu ʻia i ka wā e haki ana i ka honua. ʻO ka hana mua i hana ʻia e ka ʻōpala e hoʻonui i ke kino e haki ana i kona kūlana o ke kaulike a ʻo ke koena e hana ʻia e ka umekaumaha o ka Honua.
3. He kinipōpō kiloi. Ma ka paʻi ʻana i ko mākou ikaika ma ka pōpō i ka maha, hoʻonui mākou i ka lawa i mea e hele ai i ka mamao ma waena o mākou a me kahi mea pāʻani, a laila hāʻawi iā ia i kahi ikehu kinetic a laila, i ke kau ʻana iā ia, pono e pale aku kā mākou hoa me kahi hana like a ʻoi paha. kiʻekiʻe: a pēlā e hoʻōki ai i ka neʻe. Inā ʻoi aku ka nui o ke kinipōpō e ʻoi aku ka nui o ka hana e kāpae iā ia ma mua o ka liʻiliʻi.
4. He pōhaku ma kahi puʻu. E kuhi mākou i kahi pōhaku i kahi puʻu. ʻO ka hana a mākou e hana nei i ka wā e pahu ana iā ia e ʻoi aku ka nui ma mua o ka ikehu hiki o ka pōhaku a me ka ʻumeume ʻana o ka umekaumaha i kāna nuipa, a i ʻole ʻaʻole hiki iā mākou ke neʻe i luna a i ʻole, ʻoi aku ka maikaʻi, e ʻānai ia iā mākou. Inā, e like me Sisyphus, iho ka pōhaku i ka pali i kahi ʻaoʻao ʻē aʻe, e hoʻokuʻu ia i kona ikehu i loko o ka ikehu kinetic i kona iho ʻana i lalo. E hilinaʻi kēia ikehu kinetic i ka nui o ka pōhaku a me ka wikiwiki e loaʻa iā ia i kona hāʻule.
5. He kaʻa kaʻa lola Loaʻa iā ia ka ikehu kinetic i kona iho ʻana a hoʻonui i ka wikiwiki. Nā manawa ma mua o ka hoʻomaka ʻana o kona iho, e loaʻa ka ikehu i ka kaʻa a ʻaʻole ka ikehu neʻe; Akā i ka manawa e hoʻomaka ai ka neʻe, e lilo i ka ikehu āpau i kinetic a hiki i kona kiko kiʻekiʻe ke pau ka hāʻule a hoʻomaka ka piʻina hou. ʻOiai, ʻoi aku ka nui o kēia ikehu inā piha ke kaʻa i ka poʻe ma mua o ka hakahaka (e nui ana ka nui).

Nā ʻano ikehu ʻē aʻe