Tus qauv ntawm qhov siab tshaj plaws yog dab tsi?
Tus qauv ntawm qhov siab tshaj plaws yog dab tsi?

Video: Tus qauv ntawm qhov siab tshaj plaws yog dab tsi?

Video: Tus qauv ntawm qhov siab tshaj plaws yog dab tsi?
Video: 10 Lub qhov kub loj tshaj plaws hauv ntiaj teb/10 ອັນດັບບໍ່ຄໍາໃນໂລກ 2024, Kaum ib hlis
Anonim

Yog hais tias α = 0 °, ces ntsug tshaj tawm yog sib npaug rau 0 (Vy = 0), thiab qhov no yog cov ntaub ntawv ntawm kab rov tav projectile motion. Assine ntawm 0 ° yog 0, ces qhov thib ob ntawm qhov kev sib npaug ploj mus, thiab peb tau txais: hmax = h - pib qhov siab los ntawm qhov peb tab tom tso cov khoom yog qhov qhov siab tshaj plaws inprojectile zog.

Kuj paub, dab tsi yog lub mis rau qhov siab tshaj plaws hauv qhov projectile?

Cov qhov siab tshaj plaws ntawm projectile nyob ntawm qhov pib tshaj tawm v, lub kaum sab xis tso tawm θ, thiab qhov nrawm vim lub ntiajteb txawj nqus. Unit ntawm qhov siab tshaj plaws yog meters (m). θ = lub kaum sab xis ntawm qhov pib tshaj tawm los ntawm lub dav hlau kab rov tav (radians lossis degrees).

Tsis tas li ntawd, tus qauv rau qhov siab hauv physics yog dab tsi? Lub peev xwm lub zog ntawm ib yam khoom loj m ntawm qhov siab h hauv gravitational teb g yog mgh. Yog li 1/2 mv^2 = mgh thiab peb daws rau h. m rho tawm ntawm ob sab ces faib los ntawm g thiab koj tau v^2/2g = h.

Kuj kom paub, koj yuav ua li cas thiaj nrhiav tau qhov siab tshaj plaws ntawm qhov sib npaug plaub npaug?

Peb ua tau txheeb xyuas yam tsawg kawg nkaus los yog siab kawg tus nqi ntawm parabola los ntawm kev txheeb xyuas qhov y-coordinate ntawm vertex. Koj tuaj yeem siv daim duab rau txheeb xyuas lub vertex los yog koj ua tau nrhiav yam tsawg kawg nkaus los yog siab kawg tus nqi algebraically byusing tus qauv x = -b / 2a. Cov qauv no yuav muab rau koj thex-coordinate ntawm vertex.

Qhov ceev ntawm qhov siab tshaj plaws yog dab tsi?

Lub pob attains a qhov siab tshaj plaws H thiab rangeR. Thaum lub projectile ncav cuag qhov siab tshaj plaws , verticalcomponent ntawm nws nrawm yog momentarily zero (vy= 0 m/s).

Pom zoo: