Mphamvu ya Kinetic - mavuto ndi mayankho

Mphamvu ya Kinetic - mavuto ndi mayankho

1. Magalimoto awiri ali ndi kulemera kofanana , akuyenda ndi mphamvu yosiyana ya kinetic. Mphamvu ya kinetic ya galimoto yoyamba ndi kuwirikiza kasanu ndi kanayi kuposa mphamvu ya kinetic ya galimoto yachiwiri. Kuyerekeza liwiro la galimoto yoyamba ndi galimoto yachiwiri ndi…..

Zodziwika:

Kulemera kwa galimoto A (m _A ) = m

Kulemera kwa galimoto B (m _B ) = m

Mphamvu ya kayendedwe ka galimoto B (K E _B ) = K E

Mphamvu ya kayendedwe ka galimoto A (K E _A ) = 9 K E

Kufunidwa: Kuyerekeza liwiro la galimoto yoyamba ndi galimoto yachiwiri

Yankho:

Equation ya mphamvu ya kinetic:

KE = 1/2 mv ²

2 K E = mv ²

v ² = 2 K E / m

Liwiro la galimoto A:

v ² = 2 K E _A / m _A = 2 (9 K E ) / m = 18 K E / m

Liwiro la galimoto B :

v ² = 2 K E _B / m _B = 2 K E / m = 2 K E / m

Kuyerekeza liwiro la galimoto A ndi galimoto B:

18 K E / m : 2 K E / m

18: 2

9: 1 = 3 ² : 1 ²

[irp]

2. Mphamvu ya kinetic ya chinthucho pamalo B = 100 J. Ngati kulemera kwa chinthucho ndi 2.5 kg , ndiye kuti dziwani mphamvu ya kinetic ya chinthucho ikagunda pansi pamalo C. Kuthamanga chifukwa cha mphamvu yokoka ndi 10 m/s ².

Anakonza

Mphamvu ya kinetic ya chinthu ikafika pa mfundo B:

PE = mgh = (2.5)(10)(4) = 100 Joules

Mphamvu ya kinetic ya chinthu ikafika pa mfundo C:

PE = mgh

PE = (2.5)(10)(4 + 6)

PE = (2.5)(10)(10)

PE = 250 Joule

[irp]