Neʻe like ʻana i loko o kahi pōʻai ākea - nā pilikia a me nā hoʻonā

1. Ua hoʻopuni ʻia kahi pōpō 0.2-kg, i hoʻopaʻa ʻia i ka wēlau o ke kaula ākea, i loko o kahi pōʻai o 1 mika ka radius a ʻo ka wikiwiki kiʻekiʻe loa o ka pōpō he 10 rpm. He aha ka nui o ka wikiwiki centripetal a me ka nui o ka ikaika tension?

ʻIke ʻia:

Nuipaʻa (m) = 0.2 kg

Ka laulā (r) = 1 m

Ka wikiwiki angular (ω) = 10 rev/min = 10 rev/60 s = 0.17 rev/s = (0.17)(6.28 rad)/s = 1 rad/s

Ka wikiwiki (v) = r ω = (1 m)(1 rad/s) = 1 m/s

Makemake ʻia: he _s a me Σ F

Lōlā:

(a) Ka nui o ka wikiwiki centripetal

(b) Ka nui o ka ikaika hoʻoluhi

Σ F = ma

T = ma _s

T = (0.2 kg)(1 m/s ² )

T = 0.2 kg m/s ²

T = 0.2 N

ʻAʻole maopopo

2. Ke kaʻa like nei kahi pōpō 1-kg ma ka hopena o ke kaula i loko o kahi pōʻai ʻaoʻao o 1 m ka radius. E haki ke kaula ke ʻoi aku ka nui o ke kaomi i loko o 100 N. He aha ka wikiwiki loa e hiki ai i ka pōpō ke loaʻa?

ʻIke ʻia:

Nuipaʻa (m) = 1 kg

Radius (r) = 1 mika

ʻO ka ikaika hoʻopaʻapaʻa (T) = ka ikaika centripetal ( Σ F) = 100 N

Makemake ʻia: v ka palena kiʻekiʻe loa

Lōlā:

ʻAʻole maopopo

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1. Ka nuipa a me ke kaumaha
2. Ka ikaika maʻamau
3. Ke kānāwai ʻelua o ka neʻe ʻana o Newton
4. ʻO ka ikaika pili
5. Neʻe ʻana ma luna o kahi ʻili pālahalaha me ka ʻole o ka ikaika friction
6. ʻO ka neʻe ʻana o nā kino ʻelua me ka wikiwiki like ma luna o ka ʻili pālahalaha ʻinoʻino me ka ikaika friction
7. Neʻe ʻana ma luna o kahi mokulele i hoʻokiʻekiʻe ʻia me ka ʻole o ka ikaika friction
8. Ka neʻe ʻana ma luna o ka mokulele i hoʻohaʻahaʻa ʻia me ka ikaika friction
9. Neʻe ʻana i loko o kahi elevator
10. Hoʻopili ʻia ka neʻe ʻana o nā kino e nā kaula a me nā pulleys
11. ʻElua mau kino me ka nui like o ka wikiwiki
12. Ke hoʻopuni ʻana i kahi piʻo pālahalaha - nā dinamika o ka neʻe pōʻai
13. Ke hoʻopuni ʻana i kahi piʻo panakō - nā dinamika o ka neʻe pōʻai
14. Neʻe like ʻana ma kahi pōʻai ʻākea
15. Ka ikaika centripetal i ka neʻe pōʻai like