Ukunyakaza kwe-Momentum Impulse kanye ne-Projectile – Izinkinga Nezixazululo

Ukunyakaza kwe-Momentum Impulse kanye ne-Projectile – Izinkinga Nezixazululo

1. Ibhola elingu-0.2 kg lizofakwa emgodini C, njengoba kuboniswe esithombeni esingezansi. Umshayi ushaya ibhola ngomzuzwana ongu-0.01 bese indlela ye-BC ihambe ngomzuzwana o-1. Thola ubukhulu bamandla ukuze ibhola lifakwe emgodini C. Ukusheshisa ngenxa yamandla adonsela phansi kungu-10 m/s ².

Kwaziwa:

I-engeli (θ) = 60 ^o

Isisindo sebhola (m) = 0.2 kg

Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s ²

Isikhawu sesikhathi (Δt) = 0.01 imizuzwana

Isikhathi sokuphumula endleleni yokuhamba BC (t) = 1 isekhondi

Kufunwa: Amandla (F)

Isixazululo:

Isibalo se-impulse : I = F Δt

Isibalo soshintsho ku- momentum : Δp = m (v _t – vo _o ).

Isifiso silingana noshintsho kumfutho :

I = Δp

F Δt = m (v _t – vo _o )

F = m (v _t – vo _o ) / Δt

Kwaziwa:

Δt = 0.01 isekhondi

m = 0.2 kg

v _t = isivinini sokugcina esilinganisweni se-impulse-momentum = isivinini sokuqala sebhola (v _o ) ekunyakazeni kwe-projectile

v _o = isivinini sokuqala esilinganisweni se-impulse-momentum = 0 m/s (ekuqaleni ibhola lapho liphumule)

F = m (v _t – vo _o ) / Δt

F = 0.2 (v _t – 0) / 0.01

F = 0.2 v _t / 0,01

iyaqhubeka ……

Nquma isivinini sokuqala sebhola (v _o ) ekunyakazeni okubonakalayo

Njengoba ibhola lishaywa kuze kube yilapho ibhola lifika ephuzwini B = ingxenye 1 yokunyakaza kwe-projectile.

Ibhola lihamba lisuka endaweni B liye ku-C = ingxenye 2 yokunyakaza kwe-projectile.

Ingxenye 2 yokunyakaza okuqoshwe phansi:

Ukunyakaza okubonakalayo kungaqondwa ngokuhlaziya izingxenye ezivundlile neziqondile zokunyakaza ngokwehlukana. Ukunyakaza kuka-x kwenzeka ngesivinini esingaguquki kanti ukunyakaza kuka-y kwenzeka ngokusheshisa okungaguquki kwamandla adonsela phansi.

Kwaziwa:

Ibanga elivundlile (x) = amamitha angu-5

Isikhathi emoyeni (t) = umzuzwana o-1

u-x no-t bayaziwa ukuze u-v _ox angabalwe kusetshenziswa i-equation yokunyakaza okuqondile okufanayo . u-v _ox uyingxenye evundlile yesivinini sokuqala sebhola.

v _ox = x / t = amamitha ama-5 / umzuzwana o-1 = 5 m/s.

Ingxenye 1 yokunyakaza okuqoshwe phansi:

Ingxenye evundlile yejubane, i-v _ox ihlale ifana ngakho-ke i-v _ox engxenyeni 1 yokunyakaza kwe-projectile = v _ox engxenyeni 2 yokunyakaza kwe-projectile = 5 m/s.

Kuyaziwa

i-v _ox = 5 m/s

θ = 60 ^o

u-v _ox no-θ bayaziwa ngakho isivinini sokuqala (vo _o ) singabalwa.

cos θ = isichasiselo / i-hyp

cos θ = v _ox / v _o

v _o = v _ox / cos θ = 5 / cos 60 ^o = 5 / 0.5 = 10 m/s

Ijubane lokuqala (v _o ) lingu-10 m/s.

Isivinini sokuqala sebhola (v _o ) ekunyakazeni okubonakalayo = isivinini sokugcina sebhola (v _t ) esilinganisweni se-impulse-momentum.

Nquma ubukhulu bamandla (F)

F = 0.2 v _t / 0.01

F = 0.2 (10) / 0.01

F = 2 / 0.01

F = 200 Newton

1. Buyini ubudlelwano phakathi kokushukuma kanye noshintsho emgudwini?
   • Impendulo: I-Impulse ingumkhiqizo wamandla nesikhathi esebenza ngaso, futhi ilingana noshintsho kumfutho wento. Ngokwezibalo, $Impulse=\Delta p$, lapho $\Delta p$ ushintsho emgqigqweni.
2. Ukwanda kwesikhathi sokushayisana, njengendawo egobile emotweni, kuthinta kanjani amandla atholwe ngesikhathi sokushayisana?
   • Impendulo: Ukwandisa isikhathi somthelela kunciphisa amandla ajwayelekile atholakala ngesikhathi sokushayisana. Lokhu kungenxa yokuthi i-pulse (ushintsho ku-momentum) ayiguquki ngokushayisana okuthile, futhi ngokwandisa isikhathi, amandla asatshalaliswa isikhathi eside, ngaleyo ndlela kunciphisa amandla ajwayelekile.
3. Yini ehlala ingaguquki kumuntu oqhumayo ohambayo ngaphansi kwethonya lamandla adonsela phansi kuphela?
   • Impendulo: Ijubane elivundlile le-projectile lihlala lingaguquguquki uma amandla adonsela phansi kuphela esebenza kuyo. Nokho, ijubane elivundlile liyashintsha ngenxa yokusheshisa kwamandla adonsela phansi.
4. Kungani indlela ye-projectile ingaphansi kwethonya lamandla adonsela phansi?
   • Impendulo: Indlela iyisibonelo ngoba ngenkathi ijubane elivundlile lihlala lingaguquguquki, ijubane elivundlile lihlala lishintsha ngokusheshisa okudonsela phansi, okuholela ebudlelwaneni obunezinhlangothi ezine phakathi kokuhamba okuvundlile nokuqondile.
5. Kwenzekani ngesivinini sesimiso esihlukanisiwe uma kungekho mandla angaphandle asebenzayo kuso?
   • Impendulo: Uma kungekho mandla angaphandle asebenza ohlelweni oluhlukanisiwe, umfutho walo wonke uhlala ulondolozwe. Lokhu kwaziwa ngokuthi ukulondolozwa komfutho.
6. Intshiseko enikezwa yinduku yebhola iqhathaniswa kanjani lapho ibhola lishaywa ukuze ligijime kahle uma liqhathaniswa nalapho lishaywa kancane?
   • Impendulo: Umfutho onikezwa yi-baseball mkhulu uma ushaywa ukuze ugijime ekhaya uma kuqhathaniswa nalapho ushaywa kancane, njengoba ushintsho kumfutho webhola (kusuka kokuma kuye ekuphepheni) lukhulu kakhulu esimweni se-home run.
7. Uma isibhamu sikhishwa sisuka phansi nge-engela bese sibuyela phansi, isivinini saso sokuqalisa kanye nesokufika siqhathaniswa kanjani?
   • Impendulo: Uma kungekho ukumelana nomoya, isivinini sokufika kwendiza sizolingana nesivinini sayo sokuqalisa. Lokhu kungenxa yokongiwa kwamandla.
8. I-engeli yokuqalisa kanye nobubanzi be-projectile kuhlobene kanjani, uma kucatshangelwa ukuthi akukho ukumelana nomoya?
   • Impendulo: Ngesivinini sokuqala esinikeziwe, ububanzi obukhulu be-projectile bufinyelelwa engela lokuqalisa elingama-degree angu-45. Ukuqalisa ngama-engeli angaphansi noma amakhulu kunama-degree angu-45 kuzoholela ebangeni elifushane.
9. Kungani ukwandisa isikhathi amandla asebenza ngaso entweni, njengokubamba iqanda ngokunyakaza okuncane kwesandla, kunciphisa amathuba okuphuka noma ukulimaza into?

• Impendulo: Ukwandisa isikhathi amandla asebenza ngaso kusabalalisa i-pulse (ushintsho kumfutho) isikhathi eside, ngaleyo ndlela kunciphisa amandla ajwayelekile atholwa yinto. Ngokubamba iqanda ngokunyakaza okuncane kwesandla, amandla okubanjwa ayasabalala, kunciphisa amathuba okuphuka kweqanda.