Muchidzidzo chefizikisi chakapfuura, takadzidza misoro yesimba rezvikamu uye simba rekufamba . Musimba rezvikamu, takadzidza zvidimbu mukufamba kwekushandura ( kufamba kwemutsara , kufamba kwedenderedzwa , kufamba kweparabolic ). Musimba rekufamba, takadzidza miviri yakatsiga inotenderera. Munyaya iyi, takadzidza zvinhu mukuenzanisa. Kune mhando mbiri dzesimba, dzinoti static equilibrium uye dynamic equilibrium. Sekureva kwemutemo wekutanga waNewton, chinhu chiri mu static equilibrium kana chinhu chiri pazororo uye chinhu chiri mu dynamic equilibrium kana chinhu chiri kufamba nevelocity isingachinji. Pepa iri rinonyanya kutarisana nekukurukurirana kwe static equilibrium (zvinhu zvakamira).
Pfungwa ye "rigid body equilibrium" ruzivo rwakakosha zvikuru uye ine mashandisirwo akawanda muhupenyu hwezuva nezuva, kunyanya mumunda weinjiniya. Kunzwisisa nekuverenga masimba anoshanda pachinhu chiri mumamiriro ekuenzana kwe "static" kwakakosha zvikuru, kunyanya kune nyanzvi dzehunyanzvi (vagadziri vezvivakwa kana mainjiniya). Pakugadzira chimwe chinhu, chingave chivakwa, zambuko, mota, nezvimwewo, vagadziri vezvivakwa kana mainjiniya vanoongororawo nokungwarira kana chimiro chechivakwa, mota, zambuko, nezvimwewo, chichikwanisa kumira masimba anoshanda pachiri kuitira kuti chisaputsike.
Muenzaniso wezvinetso
1. Funga nezvemufananidzo unotevera! Tsvimbo inorema 1,5 kg yakasungirirwa yakatwasuka kumadziro kune rumwe rutivi, uye rambi rinoturikwa kure nehinji. Kusimba kwetambo kuti tsvimbo irambe yakaenzana kuri…
Kukurukurirana
Zvinozivikanwa:
Huremu hwemutoro (m1 ) = 2 kg
Huremu hwetsvimbo (m2 ) = 1,5 kg
Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s 2
Kurema kwemutoro (w)1) = (2)(10) = 20 Newton
Kurema kwebhawa (w 2 ) = (1,5)(10) = 15 N
Mubvunzo: Hukuru hwekumanikidzwa kwetambo kuitira kuti tsvimbo ive yakaenzana
Mhinduro:
Kureba kwetambo kunoverengerwa uchishandisa fomura yePythagorean:
Verenga simba rekumanikidzwa kwetambo (T ):
Sarudza axis yekutenderera pahinji. Funga nezvenguva iyo simba rinoshanda patsvimbo.
Nguva Yesimba 1:
τ 1 = w 2 r 2 = (15 N)(0,4 m) = -6 Nm
Nguva yesimba 1 inoita kuti tsvimbo itenderere newachi kuitira kuti nguva iyoyo yesimba 1 ive nechiratidzo chekusateerera.
Nguva Yesimba 2:
τ 2 = w 1 r 1 = (20 N)(0,6 m) = -12 Nm
Nguva yesimba 2 inoita kuti tsvimbo itenderere newachi kuitira kuti nguva iyoyo yesimba 1 ive nechiratidzo chekusateerera.
Nguva Yesimba 3:
τ 3 = T r 3 chivi θ = (T)(0,8)(0,6/1) = 0,48T
Nguva yesimba 3 inoita kuti tsvimbo itenderere ichipesana newachi kuitira kuti nguva iyoyo yesimba 3 ive nechiratidzo chakanaka.
Kuti hurongwa hurambe hwakamira, nguva yesimba ( Στ) inobuda (Στ) = 0
Στ = 0
τ 1 + τ 2 + τ 3 = 0
– 6 – 12 + 0,48T = 0
– 18 + 0,48T = 0
0,48T = 18
T = 18/ 0,48
T = 37,5 Newton
Kwakabva mubvunzo:
Mibvunzo yeNational Examination Physics yeChikoro Chesekondari/Chikoro Chepamusoro Chebasa
