Kuyesera Kosasunthika ndi Kinetic Friction

Malangizo Oyesera Kukangana Kosasunthika ndi Kinetic

Mutu wa kuyesera: Kukangana kosasinthasintha ndi kukangana kwa kinetic

Zolinga za kuyesera:

- Kudziwa mphamvu yokhazikika yokangana

- Kudziwa mphamvu ya kinetic friction

Zida ndi zipangizo: Dynamometer, kuwala yaying'ono.

Chiphunzitso choyambira:

Mphamvu Yokangana

Kukangana ndi mphamvu yotsutsa yomwe imagwira ntchito pakati pa zinthu zomwe zakhudzana. Munkhaniyi, kukangana komwe kwaphunziridwa kukugwirizana ndi mphamvu yokangana yomwe imagwira ntchito pakati pa zinthu ziwiri zolimba zomwe zakhudzana.

Mphamvu yokangana pa chinthu choyenda nthawi zonse imakhala yosiyana ndi njira yoyendera chinthucho.

Pali mitundu iwiri ya mphamvu yokangana, yomwe ndi mphamvu yokangana yosasinthasintha (f)._s) ndi mphamvu ya kukangana kwa kinetic (f_kKukangana kosasunthika kumagwira ntchito ngati chinthu sichikuyenda, pomwe kukangana kosasunthika kumagwira ntchito ngati chinthu chikuyenda. Ngati mutakankhira tebulo koma tebulo silikuyenda, mphamvu yokangana yomwe imagwira ntchito pa tebulo losasunthika ndi kukangana kosasunthika. Mosiyana ndi zimenezi, pamene tebulo likuyenda, mphamvu yokangana yomwe imagwira ntchito pa tebulo ndi kukangana kosasunthika.

Mphamvu Yokangana Yosasunthika

Kukangana kosasinthasintha ndi mphamvu yokangana yomwe imagwira ntchito pamwamba pa zinthu zomwe zikukhudzana wina ndi mnzake pamene zinthuzo sizikuyenda.

f_s = μ_s N

Lamulo Loyamba la Newton limati chinthu chimakhala chili pampando ngati mphamvu yonse (mphamvu yotuluka) ili yofanana ndi zero.

ΣF_x = 0

F – f_s = 0

F = f_s

Chinthu chikatsala pang'ono kusuntha (chinthucho chikadali chosasunthika), mphamvu yayikulu yokankhira yosasunthika imakhala yofanana ndi mphamvu yokankhira kapena kukoka.

Mphamvu Yokangana ya Kinetic

Kukangana kwa kinetic ndi mphamvu yokangana yomwe imagwira ntchito pamwamba pa zinthu zomwe zikukhudzana wina ndi mnzake pamene zinthuzo zikuyenda.

f_k = μ_k N

Lamulo Loyamba la Newton limati chinthu chimayenda pa liwiro losasintha ngati mphamvu yonse (mphamvu yotuluka) ndi yofanana ndi zero.

F – f_k = 0

F = f_k

Chinthu chikayenda pa liwiro losasintha, kukula kwa mphamvu ya kinetic friction kumakhala kofanana ndi kukula kwa mphamvu yokankhira kapena kukoka.

Masitepe oyesera:

1. Ikani chipikacho pamalo athyathyathya.

2. Lumikizani dynamometer ku block

3. Kokani dynamometer mpaka chipikacho chitatsala pang'ono kusuntha.

4. Werengani kukula kwa mphamvu yomwe yasonyezedwa ndi dynamometer, lembani mu gawo la mphamvu yosasunthika.

5. Kokani dynamometer mpaka chipikacho chizisuntha pa liwiro losasintha.an

6. Werengani kukula kwa mphamvu yomwe yasonyezedwa ndi dynamometer, ilembeni mu gawo la mphamvu ya kinetic friction.

7. Bwerezani kuyesera katatu

Kusanthula Deta ndi Deta:

Ayi	Mphamvu yosasunthika yokangana (f)s)	Mphamvu ya kukangana kwa kinetic (f)k)
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Avereji

Yankhani mafunso otsatirawa:

Ndi chiyani chachikulu, static friction kapena kinetic friction? Chifukwa chiyani?

Mapeto

Fotokozani mfundo yanu.