Kugwiritsa ntchito mphamvu yamakina yosungira kayendedwe ka zombo - mavuto ndi mayankho

1. Mpira wokankha umachoka pansi pa ngodya θ = 30 ^o ndi liwiro loyambirira la 10 m/s. Kulemera kwa mpira = 0.1 kg. Kuthamanga chifukwa cha mphamvu yokoka ndi 1 0 m/s ² . Dziwani (a) Mphamvu yokoka pamalo okwera kwambiri (b) Malo okwera kwambiri kapena kutalika kwakukulu

Zodziwika:

Kulemera (m) = 0.1 kg

Liwiro loyambirira (v _o ) = 10 m/s

Ngodya = 30 ^o

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

Yankho:

(a) Mphamvu yokoka

Werengerani gawo lopingasa (v _ox ) ndi gawo loyima (v _oy ) la liwiro loyambirira.

v_ox =v_o cos θ = (10)(cos 30^o) = (10)(0.5√3) = 5√3 m/s

v _oy = v _o tchimo θ = (10)(tchimo 30 ^o ) = (10)( 0.5) = 5 m/s

Mphamvu yoyambirira yamakina

Mphamvu yoyambirira yamakina (ME _o ) = mphamvu ya kinetic (KE)

ME _o = KE = ½ mv _o ² = ½ (0.1) (10) ² = ½ (0.1) (100) = ½ (10) = 5 Joules

Mphamvu yomaliza yamakina

Mphamvu ya kinetic pamalo okwera kwambiri:

KE = ½ mv _ox ² = ½ (0.1) (5√3) ² = ½ (0.1) ((25) (3)) = ½ (0.1) (75) = 3.75 Joules

Mfundo yosungira mphamvu zamakanika

Mphamvu yoyambirira yamakina (ME _o ) = mphamvu yomaliza yamakina (ME _t )

KE = PE + KE

5 = EP + 3.75

PE = 5 – 3.75 = 1.25 Joule

Mphamvu yokoka yomwe imapezeka pamalo okwera kwambiri ndi 1.25 Joules.

(b) Malo okwera kwambiri kapena kutalika kwakukulu

PE = mgh

1.25 = (0.1)(10) h

1.25 = ola

Kutalika kwakukulu ndi mamita 1.25.

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2. Mpira wa 0.1-kg umayendetsedwa mopingasa ndi liwiro loyambirira v _o = 10 m/s kuchokera ku nyumba yokwera mamita 10. Kuthamanga chifukwa cha mphamvu yokoka ndi 10 m/s ^2. Dziwani mphamvu ya kinetic ya mpirawo ukagunda pansi.

Zodziwika:

Kulemera (m) = 0.1 kg

Liwiro loyambirira (v _o ) = 10 m/s

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

Kusintha kwa kutalika (h) = 10 – 2 = 8 m

Kufunidwa: mphamvu ya kinetic pa mamita awiri pamwamba pa nthaka

Yankho:

Mphamvu yokoka (PE) = mgh = (0.1)(10)(10) = 10 Joules

Mphamvu yoyambirira ya kinetic (KE) = ½ mv _o ² = ½ (0.1)(10) ² = ½ (0.1)(100) = ½ (10) = 5 Joules

Mphamvu yomaliza ya kinetic = mphamvu yoyamba yokoka + mphamvu yoyambirira ya kinetic = 10 + 5 = 15 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