Zitsanzo 8 za Lamulo Lachiwiri la Newton la Kusuntha
1. Chinthu cholemera makilogalamu 1 chimayenda ndi liwiro losalekeza la 5 m/s2Kodi mphamvu yochokera pamenepo yomwe imasuntha chinthucho ndi yaikulu bwanji?
Zokambirana
Ndizodziwika kuti :
Kulemera kwa chinthu (m) = 1 kg
Kuthamanga (a) = 5 m/s2
Anafunsa : mphamvu yochokerapo yomwe imasuntha chinthu
Yankhani :
Lamulo Lachiwiri la Newton limati ngati pali mphamvu yochokera pa chinthu, chinthucho chidzathamanga, pomwe kukula kwa kuthamangako kumagwirizana mwachindunji ndi kukula kwa mphamvu yochokerapo ndipo motsutsana ndi kulemera kwa chinthucho. Kulunjika kwa kuthamanga kwa chinthucho kuli kofanana ndi komwe mphamvu yochokerayo ikupita. Mwa masamu:
Kufotokozera kwa fomula:
Sigma F = mphamvu yochokera ku mphamvu yonse (mayunitsi apadziko lonse lapansi ndi kg m/s2 (wotchedwanso Newton)
m = kulemera kwa chinthu (gawo lapadziko lonse ndi kilogalamu, chidule cha kg)
a = kufulumizitsa (gawo lapadziko lonse lapansi ndi mamita pa sekondi imodzi, chidule m/s)2)
Kotero mphamvu yomwe imasuntha chinthucho ndi:
2. Kulemera kwa chipikacho = 1 kg, F = 2 Newton. Kukula ndi komwe chipolopolocho chimathamangira ndi…
Zokambirana
Ndizodziwika kuti :
Kulemera kwa chipika (m) = 1 kg
Mphamvu (F) = 2 Newtons
Anafunsa : kukula ndi njira yofulumizitsira chipikacho (a)
Yankhani :
Kuwongolera kwa kufulumizitsa kwa block = njira ya mphamvu F
3. Kulemera kwa chipikacho = 2 kg, F1 = 5 Newton, F2 = 3 Newton. Kukula ndi komwe kumayenda mofulumira kwa block ndi…
Zokambirana
Ndizodziwika kuti :
Kulemera kwa chipika (m) = 2 kg
F1 = 5 Newton
F2 = 3 Newton
Anafunsa : kukula ndi njira yofulumizitsira chipikacho (a)
Yankhani :
4. Kulemera kwa chipikacho = 2 kg, F1 = 10 Newton, F2 = 1 Newton. Kukula ndi komwe kumayenda mofulumira kwa block ndi…
Zokambirana
Ndizodziwika kuti :
Kulemera kwa chipika (m) = 2 kg
F2 = 1 Newton
F1 = 10 Newton
F1x =F1 60o = (10)(0,5) = 5 Newtons
Anafunsa : kukula ndi njira yofulumizitsira chipikacho (a)
Yankhani :
Kuwongolera kwa kufulumizitsa kwa block = njira ya mphamvu yochokera = njira ya F1x
5. F1 = 10 Newton, F2 = 1 Newton, m1 = 1 kg, m2 = 2 kg. Kukula ndi komwe kumayenda mofulumira kwa chipikacho ndi…
Zokambirana
Ndizodziwika kuti :
Kulemera kwa chipika 1 (m1) = 1 kg
Kulemera kwa chipika 2 (m2) = 2 kg
F1 = 10 Newton
F2 = 1 Newton
Anafunsa : kukula ndi njira yofulumizitsira chipikacho (a)
Yankhani :
Kuwongolera kwa kufulumizitsa kwa block = njira ya mphamvu yochokera = njira ya F1
[Chingerezi: Lamulo lachiwiri la Newton la kayendetsedwe ka zinthu - mavuto ndi mayankho]
6. 
Mphamvu zingapo zimagwira ntchito pa chinthu cholemera makilogalamu 5 monga momwe zasonyezedwera pachithunzichi. Ngati mphamvu yokangana pakati pa chinthucho ndi bolodi ndi zero, ndiye kuti kuthamanga komwe kumachitika ndi chinthucho ndi...
A. 1 m/s2
B. 4 m/s2
C. 5 m/s2
D. 9 m/s2
Zokambirana
Amadziwika kuti:
Kalembedwe 1 (F)1) = 15 Newton (kumanzere)
Kalembedwe 2 (F)2) = 10 Newton (kumanzere)
Kalembedwe 3 (F)3) = 20 Newton (njira yopita kumanja)
Kulemera kwa chinthu (m) = 5 kilogalamu
Funso: Kuthamanga komwe kumachitika ndi chinthu (a)
Yankho:
Mphamvu yochokera:
∑F = F1 +F2 - F3
∑F = 15 + 10 – 20
∑F = 25 – 20
∑F = 5 Newton
∑F = 5 kg m/s2
Kulunjika kwa mphamvu yochokerapo ndikofanana ndi komwe mphamvu 1 ikupita ndi komwe mphamvu 2 ikupita, komwe kuli kumanzere.
Fomula yachiwiri ya lamulo la Newton:
∑F = ma
5 kg m/s2 = (5 kg) a
5 m / s2 = (5) a
a = (5 m/s2/ 5
a = 1 m/s2
Kukula kwa kuthamanga kwa chinthucho ndi 1 m/s2. Kuwongolera kwa kufulumizitsa chinthu = njira ya kayendetsedwe ka chinthu = njira ya mphamvu yochokera ku zotsatira = kumanzere
Yankho lolondola ndi A.
7.
Yang'anani chithunzi cha mphamvu zomwe zikugwira ntchito pa chinthu chotsatirachi! Ngati kulemera kwa chinthucho ndi 2 kg, kuthamanga komwe kudzachitike pa chinthucho ndi...
A. 12,5 m/s2
B. 7,5 m/s2
C. 5,0 m/s2
D. 2,5 m/s2
Zokambirana
Amadziwika kuti:
Kalembedwe 1 (F)1) = 10 Newton (kumanzere)
Kalembedwe 2 (F)2) = 10 Newton (njira yopita kumanja)
Kalembedwe 3 (F)3) = 5 Newton (njira yopita kumanja)
Kulemera kwa chinthu (m) = 2 kilogalamu
Funso: Kuthamanga komwe kumachitika ndi chinthu (a)
Yankho:
Mphamvu yochokera:
∑F = F2 +F3 - F1
∑F = 10 + 5 – 10
∑F = 15 – 10
∑F = 5 Newton
∑F = 5 kg m/s2
Kulunjika kwa mphamvu yochokerapo ndikofanana ndi komwe mphamvu 2 ikupita ndipo kulunjika kwa mphamvu 3 kuli kumanja.
Fomula yachiwiri ya lamulo la Newton:
∑F = ma
5 kg m/s2 = (2 kg) a
5 m / s2 = (2) a
a = (5 m/s2/ 2
a = 2,5 m/s2
Kukula kwa kuthamanga kwa chinthucho ndi 2 m/s2. Kulunjika kwa kuthamanga kwa chinthu = njira ya kayendetsedwe ka chinthu = njira ya mphamvu yochokera = kumanja
Yankho lolondola ndi D.
8. Mphamvu zingapo zimagwira ntchito pa chinthu B monga momwe zasonyezedwera pachithunzichi.
Ngati kulemera kwa chinthu B = 4 kg, kuthamanga kwa B kuli….
A. 2,5 m/s2
B. 4,0 m/s2
C. 5,0 m/s2
D. 9,0 m/s2
Zokambirana
Amadziwika kuti:
Kalembedwe 1 (F)1) = 20 Newton (njira yopita kumanja)
Kalembedwe 2 (F)2) = 6 Newton (njira yopita kumanja)
Kalembedwe 3 (F)3) = 10 Newton (kumanzere)
Kulemera kwa chinthu (m) = 4 kilogalamu
Funso: Kuthamanga komwe kunachitikira ndi B (a)
Yankho:
Mphamvu yochokera:
∑F = F1 +F2 - F3
∑F = 20 + 6 – 10
∑F = 26 – 10
∑F = 16 Newton
∑F = 16 kg m/s2
Kulunjika kwa mphamvu yochokerapo ndikofanana ndi komwe mphamvu 1 ikupita ndipo kulunjika kwa mphamvu 1 kuli kumanja.
Fomula yachiwiri ya lamulo la Newton:
∑F = ma
16 kg m/s2 = (4 kg) a
16 m / s2 = (4) a
a = (16 m/s2/ 4
a = 4 m/s2
Kukula kwa kuthamanga kwa chinthucho ndi 4 m/s2. Kulunjika kwa kuthamanga kwa chinthu = njira ya kayendetsedwe ka chinthu = njira ya mphamvu yochokera = kumanja
Yankho lolondola ndi B.
