Magulu a Gurumuda
Mafunso atatu okhudza Potential difference equation
1. Mphamvu yamagetsi imasunthidwa mu gawo lamagetsi lofanana ndi mphamvu ya 2√3 N mtunda wa 20 cm. Ngati mphamvuyo ili pa ngodya ya 30 o kupita ku kusuntha kwa mphamvu yamagetsi, kodi kusiyana kwake ndi kotani pakati pa mphamvu yamagetsi yomwe imapezeka poyamba komanso kumapeto kwa mphamvu yamagetsi.
Zodziwika:
Mphamvu (F) = 2√3 N
Mtunda (ma) = 20 cm = 0.2 m
Ngodya (θ) = 30 o
Kufunidwa: Kusiyana kwa mphamvu yamagetsi
yankho;
Mafunso atatu okhudza equation ya liwiro la Angular
1. Chinthu choyenda munjira yozungulira chimakhala ndi utali wa 0.5 m. Tinthu timeneti timatha kuphimba ngodya ya 60π rad mu masekondi 15. Dziwani liwiro la angular la chinthucho.
Zodziwika:
Ulalo wozungulira (r) = mamita 0.5
Ngodya (θ) = 60π rad
Nthawi yopuma (t) = masekondi 15
Kufunidwa: Liwiro la angular (ω)
yankho;
Mafunso atatu okhudza mphamvu yochokera ku equation
1. Galimoto yolemera matani 5 imasuntha kuchoka pamalo opumulira mu masekondi 50, kufika pa liwiro la 72 km/ola. Mphamvu ya galimotoyo ndi…
Zodziwika:
Kulemera (m) = matani 5 = 5000 kg
Liwiro loyambirira (vo) = 0
Liwiro lomaliza (vt) = 72 km/h = 20 m/s
Nthawi yopuma (t) = masekondi 50
Akufuna: Mphamvu (F)
yankho;
Mafunso atatu okhudza Impulse equation
1. Galimoto yolemera makilogalamu 250 imayenda ndi liwiro la makilomita 72 pa ola, kenako imayendetsedwa ndi mphamvu yosasintha kotero kuti mu masekondi 5 liwiro lake limafika makilomita 80 pa ola. Dziwani mphamvu ya injini kwa masekondi 5.
Zodziwika:
Kulemera kwa galimoto (m) = 250 kg
Liwiro loyambirira (v o ) = 72 km/h = 20 m/s
Liwiro lomaliza (v t ) = 80 km/h = 22 m/s
Nthawi yopuma (t) = masekondi 5
Kufunidwa: Dziwani chikhumbo (I)
yankho;
Mafunso atatu okhudza Friction force equation
1. Block A 3 kg imayikidwa patebulo kenako imamangidwa ku chingwe chomwe chimalumikizidwa ndi miyala B = 2 kg kudzera mu pulley monga momwe zasonyezedwera. Kulemera ndi kukangana kwa ma pulleys kumanyalanyazidwa. Kuthamanga chifukwa cha mphamvu yokoka g = 10 m/s 2 . Dziwani kuthamanga kwa dongosolo ndi kupsinjika kwa chingwe ngati:
a) tebulo losalala
b) tebulo lozungulira lokhala ndi coefficient ya kinetic friction ya 0.4
Zodziwika:
Kulemera kwa chipika A (m A ) = 3 kg
Kulemera kwa thanthwe B (m B ) = 2 kg
Kuthamanga chifukwa cha mphamvu yokoka (g) = 10 m/s 2
Kulemera kwa chipika A (w A ) = mg = (3)(10) = 30 Newtons
Kulemera kwa thanthwe B (w B ) = mg = (2)(10) = 20 Newtons
Kufunidwa: Kuthamanga kwa dongosolo (a) ndi kukakamira kwa chingwe (T)
yankho;
Mafunso atatu okhudza equation ya mphamvu yachibadwa
1. Buloko ili ndi kulemera kwa 5 kg. Ngati g = 10 m/s 2 , dziwani:
a) kulemera kwa chipikacho
b) mphamvu yachibadwa ngati chipikacho chayikidwa pa ndege yathyathyathya
c) mphamvu yachibadwa ngati chipikacho chili pa ndege yopendekeka yomwe imapanga ngodya ya 30 o kupita mopingasa
Zodziwika:
Kulemera kwa chipika (m) = 5 kg
Kuthamanga chifukwa cha mphamvu yokoka (g) = 10 m/s 2
Akufuna: w, N pa ndege ndi N pa mtunda
yankho;
Mafunso atatu okhudza equation ya chingwe
1. Chithunzi chili pansipa chikuwonetsa mabuloko atatu, omwe ndi A, B ndi C omwe ali pamalo osalala opingasa. Ngati kulemera A = 1 kg, kulemera B = 2 kg ndi kulemera C = 2 kg ndi F = 10 N, ndiye kuti mudziwe chiŵerengero cha mphamvu mu chingwe pakati pa A ndi B ndi mphamvu mu chingwe pakati pa B ndi C.
Zodziwika:
Kulemera kwa A (m A ) = 1 kg
Kulemera B (m B ) = 2 kg
Kulemera kwa C (mC ) = 2 kg
Mphamvu yokoka (F) = 10 N
Akufuna: T AB : T BC
yankho;
3 Mavuto ndi mayankho okhudza Moment of inertia equation
1. Silinda yolimba ili ndi utali wa masentimita 8 ndi kulemera kwa makilogalamu 2. Pakadali pano, mpira wolimba uli ndi utali wa masentimita 5 ndi kulemera kwa makilogalamu 4. Ngati zinthu ziwirizi zikuzungulira ndi mzere pakati pawo, dziwani chiŵerengero cha nthawi ya inertia ya silinda ndi mpirawo.
Zodziwika:
Utali wozungulira wa silinda yolimba (r) = 8 cm = 0.08 m
Kulemera kwa silinda yolimba (m) = 2 kg
Utali wozungulira wa mpira wolimba (r) = 5 cm = 0.05 m
Kulemera kwa mpira wolimba (m) = 4 kg
Kufunidwa: Kuyerekeza kwa nthawi ya inertia ya silinda ndi mpira
Yankho :
Mavuto atatu ndi mayankho okhudza Momentum equation
1. Ngati liwiro la chinthucho likhala kasanu kuposa liwiro lake loyambirira, ndiye kuti liwiro la chinthucho limakhala .... mphamvu yake yoyambirira.
Zodziwika:
Liwiro loyambirira = v
Liwiro lomaliza = 5v
Misa = 1
Kufunidwa: Momentum
yankho;
Mavuto atatu ndi mayankho okhudza Speed equation
1. Galimoto imayenda kum'mwera kwa 100 m mu mphindi imodzi kenako n’kutembenukira kum’mawa 120 m mu mphindi 0.5. Dziwani liwiro lapakati la galimotoyo.
Zodziwika:
Mtunda wonse = mamita 100 + mamita 120 = mamita 220
Nthawi yonse = mphindi imodzi + mphindi 0.5 = mphindi 1.5 = masekondi 90
Kufunidwa: Liwiro lapakati
yankho;