Amandla we-Kinetic

-Delile

• Umehluko phakathi kwamandla e-kinetic namandla angahle abe khona
• Ifomula yokubalwa kwamandla ka-Kinetic
• Ukuzivocavoca kwamandla kaKinetic
• Izibonelo zamandla we-kinetic
• Ezinye izinhlobo zamandla

I- Amandla we-Kinetic Yilokho okutholwa ngumzimba ngenxa yokuhamba kwawo futhi kuchazwa njengobungako bomsebenzi odingekayo ukusheshisa umzimba lapho uphumule nobukhulu obunikeziwe ngejubane elibekiwe.

Kusho amandla Itholakala ngokusheshisa, ngemuva kwalokho into ezoyigcina ifana kuze kufike ijubane (shesha noma yehlise ijubane) ngakho-ke, ukumisa, kuzothatha umsebenzi ongemuhle wobukhulu obufanayo namandla ayo e-kinetic anqwabelene. Ngakho-ke, uma isikhathi sokuqala lapho amandla okuqala esebenza khona emzimbeni ohambayo, ijubane lifinyelela kakhulu futhi namandla amakhulu we-kinetic atholakele.

Umehluko phakathi kwamandla e-kinetic namandla angahle abe khona

Amandla we-kinetic, kanye namandla angahle abe khona, engeza ingqikithi yamandla wokusebenza (E_m = E_c + E_k). Lezi zindlela ezimbili ze amandla emishini, kinetics namandla, bahlukaniswa ngokuthi okwakamuva inani lamandla elihlobene nendawo okuhlala kuyo into ekuphumuleni futhi kungaba ngezinhlobo ezintathu:

• Amandla adonsela phansi amandla. Kuya ngobude lapho izinto zibekwa khona kanye nokuheha amandla adonsela phansi kuwo.
• Amandla anwebekayo angaba namandla. Yileso esenzeka lapho into enwebeka ithola ukwakheka kwayo kwasekuqaleni, njengentwasahlobo lapho icindezelwa.
• Amandla kagesi angaba khona. Yileyo equkethwe ngumsebenzi owenziwa yinkambu ethile kagesi, lapho inkokhiso kagesi ngaphakathi isuka endaweni ethile ensimini iye ekugcineni.

Bhekafuthi: Izibonelo Zamandla Angahle Avele

Ifomula yokubalwa kwamandla ka-Kinetic

Amandla we-Kinetic amelwe uphawu E_c (kwesinye isikhathi futhi u-E_– noma u-E₊ noma i-T noma i-K) nefomula yayo yokubala yakudala ithi FUTHI_c = ½. m. v²lapho i-m imele ubukhulu (ku-Kg) futhi i-v imele isivinini (ngo-m / s). Iyunithi yokukala yamandla e-kinetic yiJoules (J): 1 J = 1 kg. m²/ s².

Njengoba kunikezwe uhlelo lokuxhumanisa lweCartesian, ifomula yokubalwa kwamandla kagesi iyoba nefomu elilandelayo: FUTHI_c= ½. m (ẋ² + ẏ² + ¿²)

Lezi zakhiwo ziyahlukahluka kumishini ehambisanayo kanye nemishini ye-quantum.

Ukuzivocavoca kwamandla kaKinetic

1. Imoto engu-860kg ihamba ngo-50 km / h. Izoba yini amandla ayo kinetic?

Okokuqala siguqula i-50 km / h iye ku-m / s = 13.9 m / s bese sisebenzisa ifomula yokubala:

FUTHI_c = ½. 860 kg. (13.9 m / s)² = 83,000 uJ.

1. Itshe elinesisindo esingu-1500 Kg ligingqika phansi emthambekeni onqwabelana ngamandla e-kinetic angama-675000 J. Itshe lihamba ngejubane elingakanani?

Kusukela ku-Ec = ½. m .v² sine-675000 J = ½. 1500 Kg. v², futhi lapho sixazulula okungaziwa, kufanele siv² = 675000 J. 2/1500 Kg. 1, lapho v² = 1350000 J / 1500 Kg = 900 m / s, futhi ekugcineni: v = 30 m / s ngemuva kokuxazulula impande eyisikwele engu-900.

Izibonelo zamandla we-kinetic

1. Indoda ebhodini lokushushuluza. I-skateboarder ku-U ukhonkolo uhlangabezana namandla womabili (lapho eyeka emaphethelweni awo okwesikhashana) namandla e-kinetic (lapho iqala kabusha ngokuya phansi naphezulu). I-skateboarder enesisindo esikhulu somzimba izothola amandla amakhulu we-kinetic, kodwa futhi ne-skateboard esimvumela ukuba ahambe ngejubane eliphakeme.
2. I-vase ye-porcelain ewayo. Njengoba amandla adonsela phansi esebenza esitsheni sephasishi esikhubeke ngengozi, amandla e-kinetic ayakha emzimbeni wakho njengoba wehla futhi ukhishwa njengoba ushayeka phansi. Umsebenzi wokuqala owenziwe ukukhubeka usheshisa umzimba wephula isimo sawo sokulingana kanti okunye kwenziwa ngamandla adonsela phansi eMhlabeni.
3. Ibhola eliphonswayo. Ngokuphrinta amandla ethu ebholeni ekuphumuleni, sikusheshisa ngokwanele ukuze lihambe ibanga eliphakathi kwethu nomuntu esidlala naye, ngaleyo ndlela silinike amandla we-kinetic okuthi lapho, lapho silibamba, umlingani wethu kufanele aphikisane nomsebenzi olingana noma omkhulu ubukhulu futhi ngaleyo ndlela umise ukunyakaza. Uma ibhola likhulu kuzothatha umsebenzi omningi ukulimisa kunelincane.
4. Itshe elisentabeni. Ake sithi siphonsela itshe entabeni. Umsebenzi esiwenzayo lapho siwuphusha kufanele ube mkhulu kunamandla engaba khona etsheni kanye nokuheha kwamandla adonsela phansi ngobuningi bawo, ngaphandle kwalokho ngeke sikwazi ukuwunyusa noma, okubi nakakhulu, uzosichoboza. Uma, njengeSisyphus, itshe liyehla emthambekeni ongaphesheya liye kolunye uhlangothi, lizokhipha amandla alo abe namandla e-kinetic njengoba liwela ezansi. La mandla e-kinetic azoncika ebunzimeni betshe kanye nejubane eliyithola ekwindla kwalo.
5. Inqola yama-roller coaster Ithola amandla we-kinetic njengoba iwa futhi inyusa ijubane layo. Imizuzwana ngaphambi kokuba iqale ukwehla kwayo, inqola izoba namandla angabi namandla we-kinetic; Kepha uma ukunyakaza sekuqalisiwe, wonke amandla akhona aba yi-kinetic futhi afinyelela iphuzu lawo eliphezulu lapho nje kuphela ukuphela kokuwa nokukhuphuka okusha. Ngokuvamile, la mandla azobe emakhulu uma ikalishi ligcwele abantu kunokuba lingenalutho (lizoba nesisindo esikhulu).

Ezinye izinhlobo zamandla