Physics

Ma vector a unit - mavuto ndi mayankho

1. Chinthu chimayenda pa liwiro la v = (2i − 1.5j) m/s. Kodi kusuntha kwa chinthucho pambuyo pa masekondi anayi ndi kotani?

Zodziwika:

Gawo lopingasa la liwiro (v _x ) = 2 m/s

Gawo loyima la liwiro (v _y ) = 1.5 m/s

Nthawi yopuma (t) = masekondi 4

Kufunidwa: Kusamutsidwa

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Kusamutsa mavekta - mavuto ndi mayankho

1. Munthu amayenda kuchokera pa malo A kupita pa malo B, mamita 600 kumpoto; kenako kupita pa malo C, mamita 400 kumadzulo; kenako kupita pa malo D, mamita 200 kum'mwera; kenako amalize pa malo E, mamita 700 kum'mawa. Kodi kusamukako ndi kwakukulu bwanji?

Yankho:

Zodziwika:

AF = AB – BF = AB – CD = 600 – 200 = 400 m

EF = DE – DF = DE – BC = 700 – 400 = 300 m

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Kuwonjezera ma vector pogwiritsa ntchito zigawo - mavuto ndi mayankho

1. Ma vekitala atatu monga momwe zasonyezedwera pachithunzi chili pansipa.

V₁ = 30

V ₂ = 30

V ₃ = 40

Kodi ma vector otsatirawa ndi otani?

Zodziwika:

V ₁ = 30, ngodya pakati pa V ₁ ndi x axis = 30 ^o

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Zithunzi za kayendedwe kolunjika - mavuto ndi mayankho

1. Mtunda wa graph (wolunjika) motsutsana ndi nthawi (yopingasa) monga momwe zasonyezedwera pachithunzi chili pansipa. Chinthu chomwe chili pamalo opumulira chikuwonetsedwa ndi nambala…

Yankho:

Nambala 3, yowonetsedwa ndi mzere wowongoka.

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Liwiro lapakati - mavuto ndi mayankho

1. Winawake amazungulira bwalo la rectangle lalitali mamita 400 ndi m'lifupi mamita 100, nthawi 12 mu ola limodzi. Kodi liwiro lapakati ndi liwiro lapakati ndi chiyani?

Zodziwika:

Kutalika kwa rectangle = mamita 400

M'lifupi mwa rectangle = mamita 100

Kuzungulira kwa rectangle = (2 x 400 metres) + (2 x 100 metres) = 800 metres + 200 metres = 1000 metres

Mtunda = 12 x 1000 mamita = 12,000 mamita = 12 makilomita

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Mfundo yakuda - mavuto ndi mayankho

1. Madzi a magalamu 200 pa kutentha kwa 30°C osakanizidwa ndi madzi a magalamu 100 pa kutentha kwa 90°C. Kutentha kwa madzi enieni = 1 cal.gramu ⁻¹ °C ⁻¹ . Dziwani kutentha komaliza kwa chisakanizocho!

Zodziwika:

Unyinji wa madzi 2 (m ₁ ) = 200 magalamu

Kutentha kwa madzi 1 (T ₁ ) = 30 ^o C

Unyinji wa madzi 2 (m2 ₎ = magalamu 100

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Zinthu 10 Zogwirizana ndi chingwe pamwamba pa pulley Makina a Atwood - Mavuto ndi Mayankho

1. Block A yokhala ndi kulemera kwa makilogalamu 5, yoyikidwa pamalo osalala opingasa. Block B yokhala ndi kulemera kwa makilogalamu 3 yopachikidwa kumapeto kwa chingwe cholumikizidwa ndi block A pamwamba pa pulley. Kuthamanga chifukwa cha mphamvu yokoka ndi 10 m/s ^{2. Kodi} kuthamanga kwa ma block onse awiri ndi kotani?

Zodziwika:

Kulemera kwa chipika A (m_A) = 5 kg

Kulemera kwa chipika B (m _B ) = 3 kg

Kuthamanga chifukwa cha mphamvu yokoka (g) = 10 m/s ²

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Kuyenda mozungulira - mavuto ndi mayankho

1. Chinthu cholemera makilogalamu 10 chimayenda mozungulira pa liwiro losasintha la 4 m/s. Ngati utali wa bwalolo ndi mamita 0.5, ndiye kuti:

1) Kuchuluka kwa mabwalo ndi 4/π Hz

2) Kuthamanga kwapakati pa centripetal ndi 32 ms ^-2

3) Mphamvu yapakati ndi 320 N

4) Nthawi ndi 4π s.

Kodi mawu enieni ndi ati?

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Kuyenda kwaulere kwa kugwa - mavuto ndi mayankho

1. Mwala umagwa momasuka kuchokera kutalika kwa mamita 45. Ngati kuthamanga chifukwa cha mphamvu yokoka ndi 10 ms ^-2 , kodi liwiro la mwalawo likagunda pansi ndi lotani?

Zodziwika:

Kutalika (h) = mamita 45

Kuthamanga chifukwa cha mphamvu yokoka (g) = 10 m/s ²

Kufunidwa: Liwiro lomaliza la mwala ukagunda pansi (v _t )

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