Nā pilikia i hoʻoponopono ʻia ma nā kānāwai neʻe o Newton - Ka ikaika maʻamau
1. He mea e kau ana ma luna o kahi papaʻaina, i hōʻike ʻia ma ke kiʻi ma lalo nei. ʻO ke kaumaha o ka mea he 1 kg. ʻO ka wikiwiki o ka umekaumaha he 9.8 m/s 2. E hoʻoholo i ka ikaika maʻamau i hoʻokau ʻia ma luna o ka mea e ka papaʻaina.
ʻIke ʻia:
Nuipaʻa (m) = 1 kg
Ka wikiwiki o ke koʻikoʻi (g) = 9.8 m/s 2
Kaumaha (w) = mg = (1 kg)(9.8 m/s² ) = 9.8 kg m/s² = 9.8 Newtons
Makemake ʻia: ka ikaika maʻamau (N)
Lōlā:
Ua hoʻomaha ka mea ma luna o ka papaʻaina, no laila ʻo ka ikaika ʻupena ma luna o ka mea he ʻole (ke kānāwai mua a ʻelua paha o Newton). Hana pololei ke kaumaha o ka mea i lalo, i ke kikowaena o ka Honua. Pono kekahi ikaika ʻē aʻe ma luna o ka mea e kaulike ai i ka ikaika umekaumaha . Ke hoʻomaha nei ka mea ma luna o ka papaʻaina, i hiki ai i ka papaʻaina ke hoʻopuka i kēia ikaika i luna. ʻO ka ikaika i hoʻopuka ʻia e ka papaʻaina ua kapa pinepine ʻia he ikaika maʻamau (N). ʻO ke ʻano maʻamau he kū pololei.
E koho i ke kuhikuhi i luna ma ke ʻano he kuhikuhi y maikaʻi. ʻO ka ikaika upena ma luna o ka mea:
∑ Fy = 0
N – w = 0
N = w
N = mg
N = 9.8 Newton
ʻO ka ikaika maʻamau ma luna o ka mea, i hoʻokau ʻia e ka papaʻaina he 9.8 N i luna.
ʻAʻole maopopo
2. ʻElua mau mea e kau ana ma luna o kahi papaʻaina. ʻO ke kaumaha o ka mea 1 (m1 ) = 1 kg, ke kaumaha o ka mea 2 (m2 ) = 2 kg, ka wikiwiki ma muli o ke koʻikoʻi (g) =9.8 m/s2 . E hoʻoholo i ka nui a me ke kuhikuhi o ka ikaika maʻamau i hoʻokau ʻia e m2 ma ka m1 a me ka ikaika maʻamau i hoʻokau ʻia e ka papaʻaina ma ka m2.
pāʻoihana
ʻIke ʻia:
Ka nuipa o ka mea 1 (m1 ) = 1 kg
Ka nuipa o ka mea 2 (m2 ) = 2 kg
Ka wikiwiki o ke koʻikoʻi (g) = 9.8 m/s 2
Kaumaha o ka mea 1 (w 1 ) = m 1 g = (1)(9.8 m/s 2 ) = 9.8 kg m/s 2 = 9.8 Newtons
Kaumaha o ka mea 2 (w 2 ) = m 2 g = (2)(9.8 m/s 2 ) = 19.6 kg m/s 2 = 19.6 Newtons
Makemake ʻia: N 1 a me N 2
Lōlā:
(a) Ka ikaika maʻamau i hoʻokau ʻia e m 2 i ka m 1 (N 1 )
N 1 = w 1 = 9.8 Newton
Piʻi ke kuhikuhi o N 1 .
(b) Ka ikaika maʻamau i hoʻokau ʻia e ka papa ma luna o ka m 2 (N 2 )
N 2 = w 1 + w 2 = 9.8 Newton + 19.6 Newton = 29.4 Newton
Piʻi ke kuhikuhi o N 2 .
ʻAʻole maopopo
3. He mea e kau ana ma luna o ka papa ʻaina. ʻO ke kaumaha o ka mea he 2 kg, ʻo ka wikiwiki ma muli o ke koʻikoʻi he 9.8 m/s 2. ʻO ka nui o ka ikaika F he 10 Newtons. E huli i ka nui a me ke kuhikuhi o ka ikaika maʻamau i hoʻokau ʻia e ka papa ʻaina ma luna o ka mea.
pāʻoihana
ʻIke ʻia:
Ka nuipa o ka mea (m) = 2 kg
Ka wikiwiki ma muli o ke koʻikoʻi (g) = 9.8 m/s 2
Kaumaha (w) = mg = (2 kg)(9.8 m/s² ) = 19.6 kg m/s² = 19.6 Newtons
Ikaika F (F) = 10 Newton
Makemake ʻia : ka nui a me ke kuhikuhi o ka ikaika maʻamau (N)
Lōlā:
ke kuhikuhi o ka ikaika maʻamau i luna.
Ka nui o ka ikaika maʻamau:
∑ F = 0
N – F – w = 0
N = F + w
N = 10 Newton + 20 Newton
N = 30 Newton
ʻAʻole maopopo
4. He mea e kau ana ma luna o kahi papaʻaina. ʻO ke kaumaha o ka mea he 1 kg, ʻo ka wikiwiki ma muli o ke koʻikoʻi he 9,8 m/s² , ʻo ka ikaika F 1 he 10 N a ʻo ka ikaika F 2 he 20 N. E hoʻoholo i ka nui a me ke kuhikuhi o ka ikaika maʻamau i hoʻokau ʻia e ka papaʻaina ma luna o ka mea. g = 9.8 m/ s²
pāʻoihana
ʻIke ʻia:
Nuipaʻa (m) = 1 kg
Ka wikiwiki o ke koʻikoʻi (g) = 9.8 m/s 2
Kaumaha (w) = mg = (1 kg)(9.8 m/s² ) = 9.8 kg m/s² = 9.8 Newtons
F1 = 10 Newtons
F2 = 20 Newtons
Makemake ʻia: ka nui a me ke kuhikuhi o ka ikaika maʻamau (N)
Lōlā:
Piʻi ke kuhikuhi o ka ikaika maʻamau.
Ka nui o ka ikaika maʻamau:
∑ F = 0
N – F 2 – w + F 1 = 0
N = F 2 + w – F 1
N = 20 Newton + 9.8 Newton – 10 Newton
N = 19.8 Newton
ʻAʻole maopopo
5. ʻO ke kaumaha o ka mea (m) = 2 kg, ka wikiwiki o ke koʻikoʻi (g) = 9.8 m/s² , ke kihi = 30 o . E huli i ka nui a me ke kuhikuhi o ka ikaika maʻamau i hoʻokau ʻia ma luna o ka mea.
Lōlā:
ʻO w ke kaumaha, ʻo w x ka ʻāpana pae o ke kaumaha, ʻo w y ka ʻāpana kū pololei o ke kaumaha, ʻo N ka ikaika maʻamau.
ʻIke ʻia:
ka nuipaʻa (m) = 2 kg
ka wikiwiki o ke koʻikoʻi (g) = 9.8 m/s 2
kaumaha (w) = mg = (2 kg)(9.8 m/s² ) = 19.6 kg m/s² = 19.6 Newtons
w x = w sin 60 o = (19.6 N)(0.5) √ 3 = 9.8 √ 3 Newtons
w y = w cos 60 = (19.6 N)(0.5) = 9.8 Newtons
Makemake ʻia: ka ikaika maʻamau (N)
Lōlā:
∑ F = 0
N – w y = 0
N = w y
N = 9.8 Newton
ʻAʻole maopopo
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- Ka nuipa a me ke kaumaha
- Ka ikaika maʻamau
- Ke kānāwai ʻelua o ka neʻe ʻana o Newton
- ʻO ka ikaika pili
- Ka neʻe ʻana ma luna o ka ʻili ākea me ka ʻole o ka ikaika friction
- ʻO ka neʻe ʻana o nā kino ʻelua me ka wikiwiki like ma luna o ka ʻili pālahalaha ʻinoʻino me ka ikaika friction
- Ka neʻe ʻana ma luna o ka mokulele i hoʻohuli ʻia me ka ʻole o ka ikaika friction
- Ka neʻe ʻana ma luna o ka mokulele i hoʻohaʻahaʻa ʻia me ka ikaika friction
- Neʻe ʻana i loko o kahi elevator
- Hoʻopili ʻia ka neʻe ʻana o nā kino e nā kaula a me nā pulleys
- ʻElua mau kino me ka nui like o ka wikiwiki
- Ke hoʻopuni ʻana i kahi piʻo pālahalaha - nā dinamika o ka neʻe pōʻai
- Ke hoʻopuni ʻana i kahi piʻo panakō - nā dinamika o ka neʻe pōʻai
- Neʻe like ʻana ma kahi pōʻai ʻākea
- Ka ikaika centripetal i ka neʻe pōʻai like
