Kugwiritsa ntchito mphamvu yamakina yosungira kuti munthu ayende molunjika nthawi yogwa momasuka - mavuto ndi mayankho

1. Munthu amaponya mwala wa 1 kg mmwamba pa liwiro la 2 m/s pamene akuyimirira m'mphepete mwa phiri kuti mwalawo ugwe pansi pa phiri lomwe lili pansi pa mamita 40. Kodi mphamvu ya kinetic ya mwala pa mamita 10 pamwamba pa nthaka ndi yotani? Kuthamanga chifukwa cha mphamvu yokoka g = 10 m/s ².

Zodziwika:

Kulemera (m) = 1 kg

Liwiro loyambirira (v _o ) = 2 m/s

Kusintha kwa kutalika = 40 - 10 = mamita 30

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

Kufunidwa: mphamvu ya kinetic ya miyala pamtunda wa mamita 10 kuchokera pansi

Yankho:

Mphamvu yoyambirira yamakina

Mphamvu yoyambira yokoka (EP) = mgh = (1)(10)(30) = 300 Joules

Mphamvu yoyambirira ya kinetic (KE) = ½ mv _o ² = ½ (1)(2) ² = ½ (4) = 2 Joules

Mphamvu yoyambirira ya makina = mphamvu yoyambira yokoka + mphamvu yoyambirira ya kinetic = 300 + 2 = 302 Joules.

Mphamvu yomaliza yamakina

Mphamvu yomaliza ya makina = mphamvu yomaliza ya kinetic = mphamvu yoyambira yokoka + mphamvu yoyambirira ya kinetic = 300 + 2 = 302 Joules.

[irp]

2. Munthu amaponya chinthu cholemera makilogalamu 1 mmwamba mumlengalenga ndi liwiro loyambirira la 10 m/s. Dziwani (a) mphamvu yokoka pamtunda wapamwamba kwambiri (b) kutalika kwakukulu.

Kuthamanga chifukwa cha mphamvu yokoka ndi 10 m/s ²

Zodziwika:

Kulemera (m) = 1 kg

Liwiro loyambirira (v _o ) = 10 m/s

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

Kufunidwa : mphamvu yokoka pamtunda wapamwamba kwambiri komanso kutalika kwakukulu

Yankho:

(a) mphamvu yokoka yomwe ingakhalepo pamlingo wapamwamba kwambiri

Mphamvu yoyambirira ya makina:

Mphamvu yoyambirira yamakina (ME) = mphamvu yoyambirira ya kinetic (KE) = ½ mv _o ² = ½ (1)(10) ² = ½ (100) = 50 Joules.

Mphamvu yomaliza yamakina:

Mphamvu yomaliza yamakina (ME) = mphamvu yokoka (PE)

Mfundo yosungira mphamvu zamakanika:

Mphamvu yoyambirira yamakina = mphamvu yomaliza yamakina

KE = PE

50 = PE

Mphamvu yokoka ndi 50 Joules.

(b) Kutalika kwakukulu

PE = mgh

50 = (1)(10) h

50 = maola 10

h = 50 / 10 = mamita 5

Kutalika kwakukulu ndi mamita 5 kuchokera pansi.

[wpdm_package id='1174′]

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 mphamvu ya makina yosungira kuti iyende pamwamba pokhota
10. Kugwiritsa ntchito mphamvu yamakina yosungira kuti munthu ayende pa ndege yopendekeka
11. Kugwiritsa ntchito mphamvu ya makina yosungira kuti zigwiritsidwe ntchito poyendetsa zinthu