Mene ne centripetal hanzari?

Tunanin wani batu a kan daidaita jirgin sama. Biyu haskoki emanating daga gare shi, samar da wani kwana. Da darajar za a iya bayyana a matsayin a radians ko digiri. Yanzu a wasu nisa daga cibiyar batu mun zana da'ira wajen tunani. A awo na kwana, da aka bayyana a radians, a cikin irin wannan hali ne mai ilmin lissafi aboki na baka tsawon L, biyu raba katakanta da darajar da nisa tsakanin cibiyar nufi da da'irar line (R), i.e .:

Fi = L / R

Idan muka yanzu gabatar da aka bayyana a kasa tsarin, shi za a iya amfani ba kawai ga manufar kwana da radius, amma kuma centripetal hanzari, juyawa, da dai sauransu. Mafi yawansu ba su bayyana cikin hali na da wata ma'ana a kan wani juyawa karkara. Af, da ci gaba da drive kuma za a iya wakilta wani sa na da'ira, wani bambanci cewa kawai nesa daga cibiyar.

Daya daga cikin halaye na da irin wannan juyawa tsarin - wani magani lokaci. Yana nuna lokaci darajar for wanda wani sabani aya a kan karkara na koma na farko matsayi ko, wanda shi ne ma gaskiya, za su juya 360 digiri. A akai gudun juyawa da aka yi matching T = (2 * 3,1416) / Ug (nan Ug - kwana).

Rotational gudun nuna yawan cikakken rotations yi ga 1 biyu. A akai gudun v = mu samu 1 / T.

A kusurwa gudu dogara a kan lokaci da kuma abin da ake kira kwana na juyawa. Wannan shi ne, idan muka dauki kamar yadda asalin wani sabani batu A kan da'irar, to, wannan batu zai matsawa zuwa A1 a lokacin t lokacin da tsarin rotates, forming wani kwana tsakanin radii na A-A1 da cibiyar-cibiyar. Sanin lokaci da kuma kwana, yana yiwuwa yin lissafi da kusurwa gudu.

Kuma lokaci ne da wani da'irar, motsi da kuma gudun, to, a can ne kuma centripetal hanzari. Yana wakiltar daya daga cikin aka gyara kwatanta da motsi na da wani abu batu a game da wani curvilinear motsi. The sharuddan "al'ada" da "centripetal hanzari" ne m. A bambanci shi ne na biyu da aka amfani da su bayyana motsi daga cikin da'irar, a lokacin da hanzari vector ne directed zuwa tsakiyar daga cikin tsarin. Saboda haka yana da ko da yaushe dole sani ba daidai da yadda jiki motsa (ma'ana) da kuma centripetal hanzari. Ma'ana shi kamar haka: shi ne kudi na canji na gudu vector ne directed perpendicular zuwa shugabanci vector na da instantaneous gudu da kuma musanya fuskantarwa na karshen. The Encyclopedia cewa nazarin da batun ya shafi Huygens. Centripetal hanzari dabara, samarwa da shi, kama:

ACS = (v * v) / r,

inda r - radius daga curvature na traversed hanya. v - gudun motsi.

Da dabara amfani da yin lissafi da centripetal hanzari, har yanzu yana sa mai tsanani muhawara a tsakanin masu goyon baya. Alal misali, kwanan nan sanar da wani ban sha'awa ka'idar.

Huygens, la'akari da wani tsarin kahu a kan gaskiyar cewa jiki motsa a kan wani da'irar radius R tare da gudun v, auna a masomin A. Tun da inertia na vector ne directed tare da tangent zuwa da'irar, yanayin da aka samu a cikin nau'i na mike layin AD. Duk da haka, da centripetal karfi rike jiki a cikin da'irar a aya C. Idan muka nuna a fakaice cibiyar G kuma rike AB line, BO (total BS da CO), kazalika da hadin gwiwa-stock kamfanin, shi dai itace a alwatika. A daidai da dokar Pythagoras:

OA ne CO.

AB = t * v;

BS = (a * (t * t)) / 2, inda wani - hanzari. t - lokaci (a * t * t - wannan shi ne gudun).

Idan muka yanzu amfani da Pythagorean dabara, sa'an nan:

R2 + T2 + v2 = R2 + (a * T2 * 2 * R) / 2+ (a * T2 / 2) 2 inda R - radius, da kuma harafin-to-dijital rubuce-rubuce ba tare da multiplication alamar - digiri.

Huygens yarda cewa, tun lokacin t ne kananan, shi ba zai iya yi la'akari a cikin lissafin. Hanyar mayar da sama dabara, an san su zo ACS = (v * v) / r.

Duk da haka, a matsayin lokaci dauka a cikin square, akwai wani ci gaban: da ya fi girma t, da hakan daidaito. Alal misali, 0.9 ne unaccounted domin kusan 20% na karshe darajar.

A ra'ayi na centripetal hanzari da muhimmanci ga kimiyyar zamani, amma, a fili, shi ne ma farkon to kawo ƙarshen wannan batun.