Kugwiritsa ntchito mphamvu yamakina yosungira kuti iyende bwino - mavuto ndi mayankho

1. Chipika chimatsika pansi pa malo otsetsereka bwino popanda kukangana . Kodi liwiro la chipikacho ndi chiyani chikagunda pansi? Kuthamanga chifukwa cha mphamvu yokoka ndi 10 m/s ²

Zodziwika:

Kutalika (h) = 8 m

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

Kufunidwa : liwiro (v)

Yankho :

Mphamvu yoyambirira yamakina (ME _o ) = mphamvu yokoka (PE)

ME _o = PE = mgh = m (10)(8) = 80 m

Mphamvu yomaliza yamakina (ME _t ) = mphamvu ya kinetic (KE)

ME _t = KE = ½ mv ²

Mfundo yosungira mphamvu ya makina imati mphamvu yoyamba ya makina = mphamvu yomaliza ya makina:

INE _o = INE _t

80 m = ½ mv ²

80 = ½ v ²

160 = v ²

v = √160 = √(16)(10) = 4√10 m/s

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2. Chinthu cholemera makilogalamu 1 chimatsika pansi pa mamita 8. Dziwani mphamvu ya kinetic chinthucho chikayenda pa mamita 5… Kuthamanga chifukwa cha mphamvu yokoka g = 10 m/s ²

Zodziwika:

Kulemera (m) = 0.2 kg

d = mamita 5

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

Kufunidwa : mphamvu ya kinetic (KE)

Yankho:

uchimo 30 ^o = h / d

0.5 = maola / 5

h = (0.5)(5) = mamita 2.5

Kusintha kwa kutalika kwa chinthucho ndi mamita 2.5.

Mphamvu yoyambirira ya makina (ME _o ) = mphamvu yokoka (PE)

ME _o = PE = mgh = (1)(10)(2.5) = 25 Joules

Mphamvu yomaliza yamakina (ME _t ) = mphamvu ya kinetic (KE)

ME _t = KE

Mfundo yosungira mphamvu ya makina imati mphamvu yoyamba ya makina = mphamvu yomaliza ya makina:

INE _o = INE _t

25 = KE

Mphamvu ya kinetic = 25 Joules.

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1. Ntchito yochitidwa ndi mphamvu ndi mavuto ndi mayankho
2. Mavuto ndi mayankho a mphamvu zogwirira ntchito
3. Mavuto ndi mayankho a mfundo za mphamvu za makina ndi ntchito
4. Mavuto ndi mayankho a mphamvu yokoka
5. Mphamvu yomwe ingagwiritsidwe ntchito pa mavuto ndi mayankho a masika otanuka
6. Mavuto amagetsi ndi mayankho
7. Kugwiritsa ntchito mphamvu yamakina yosungira kuti munthu agwe momasuka
8. Kugwiritsa ntchito mphamvu yamakina yosungira kayendedwe ka mmwamba ndi pansi mu kayendedwe ka free fall
9. Kugwiritsa ntchito kusunga mphamvu ya makina kuti ayende pamalo opindika
10. Kugwiritsa ntchito mphamvu yamakina yosungira kuti munthu ayende pa ndege yopendekeka
11. Kugwiritsa ntchito mphamvu ya makina yosungira kuti zigwiritsidwe ntchito poyendetsa zinthu