Ka ikaika a me ka impulse - nā pilikia a me nā hoʻonā

1. Ua kiola ʻia kahi pōpō liʻiliʻi ma ka ʻaoʻao pālahalaha me ka wikiwiki mau o 10 m/s. Paʻi ka pōpō i ka paia a hōʻike ʻia me ka wikiwiki like. He aha ka loli o ka momentum linear o ka pōpō?

ʻIke ʻia:

Nuipaʻa (m) = 0.2 kg

Ka wikiwiki mua (v _o ) = -10 m/s

Ka wikiwiki hope loa (vt ₎ = 10 m/s

Hōʻike nā hōʻailona hoʻohui a me ka hoʻēmi e neʻe ana nā mea i ka ʻaoʻao ʻē aʻe.

Makemake ʻia : ka loli o ka momentum linear (Δp)

Lōlā:

ʻO ke ʻano o ka loli o ka momentum linear :

Δp = mv _t – mv _o = m (v _t – v _o )

Ka loli o ka momentum linear:

Δp = 0.2 (10 – (-10)) = 0.2 (10 + 10)

Δp = 0.2 (20)

Δp = 4 kg m/s

ʻAʻole maopopo

2. Hāʻule kūʻokoʻa kahi pōpō 10-kalama mai kahi kiʻekiʻe, kuʻi i ka papahele ma 15 m/s, a laila huli i luna ma 10 m/s. E hoʻoholo i ka impulse!

ʻIke ʻia:

Nuipaʻa (m) = 10 grams = 0.01 kg

Ka wikiwiki mua (v _o ) = -15 m/s

Ka wikiwiki hope loa (vt ₎ = 10 m/s

Makemake ʻia: Impulse (I)

Lōlā:

Ua like ka impulse (I) me ka loli o ka momentum (Δp)

I = mv _t – mv _o = m (v _t – v _o )

Manaʻo wikiwiki:

ʻO I = 0.01 (10 – (-15)) = 0.01 (10 + 15)

ʻO wau = 0.01 (25)

ʻO I = 0.25 kg m/s

ʻAʻole maopopo

3. Ua kiola ʻia kahi pōpō 200-kalama ma ka ʻaoʻao pālahalaha me ka wikiwiki o 4 m/s, a laila ua kuʻi ʻia ka pōpō ma ke kuhikuhi like. ʻO ka lōʻihi o ka hoʻopili ʻana o ka pōpō me ka ʻōpeʻapeʻa he 2 mi l kekona a ʻo ka wikiwiki o ka pōpō ma hope o ka haʻalele ʻana i ka ʻōpeʻapeʻa he 12 m/s. ʻO ka nui o ka ikaika i hoʻokau ʻia e ka mea hahau ma ka pōpō he …

ʻIke ʻia:

Nuipaʻa (m) = 200 grams = 0.2 kg

Ka wikiwiki mua (v _o ) = 4 m/s

Ka wikiwiki hope loa (vt ₎ = 12 m/s

Ka manawa manawa (t) = 2 milisekona = (2/1000) kekona = 0.002 kekona

Makemake ʻia : Ka nui o ka ikaika (F)

Lōlā:

Ke ʻano o ka impulse:

ʻO wau = Ft

Ke ʻano o ka loli o ka momentum:

mv _t – mv _o = m (v _t – v _o )

Ua like ka impulse (I) me ka loli o ka momentum (Δp)

ʻO I = Δp

Ft = m (vt _– v _o )

F (0.002) = (0.2)(12 – 4)

F (0.002) = (0.2)(8)

F (0.002) = 1.6

F = 1.6 / 0.002

F = 800 Newton

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1. Nā pilikia a me nā hoʻonā o ka momentum linear
2. Nā pilikia a me nā hoʻonā o ka momentum a me ka impulse
3. Nā pilikia a me nā hoʻonā o nā kuʻi elastic kūpono i hoʻokahi ana
4. Nā pilikia a me nā hoʻonā no nā kuʻi ʻana inelastic kūpono i hoʻokahi ana
5. Nā pilikia a me nā hoʻonā no nā collisions inelastic i hoʻokahi ana