Tambayoyi Misali na Ƙarfin Tsakiya

Misalai 4 na Tambayoyin Ƙarfin Centripetal

1. Ana ɗaure wani abu mai nauyin gram 200 a kan igiya mai sauƙi sannan a juya shi a kwance tare da saurin kusurwa ya kasance a 5 rad s^-1, kamar yadda yake a cikin hoton da ke ƙasa. Idan tsawon igiyar shine l = 60 cm, to girman ƙarfin centripetal da ke aiki akan abu shine...

A. 0,3 N

B. 0,6 N

C. 3 N

D. 6 N

E. 30 N

Tattaunawa

An san cewa:

Nauyin abu (m) = gram 200 = 200/1000 kg = 2/10 kg = 0,2 kg

Gudun kusurwa (ω) = 5 radians/daƙiƙa

Tsawon igiya = radius (r) na hanyar da'ira = 60 cm = mita 60/100 = mita 0,6

An tambaya: Girman ƙarfin centripetal da ke aiki akan wani abu shine….

Amsa:

Ƙarfin centripetal shine ƙarfin da ke haifar da shi wanda ke sa abu ya fuskanci hanzarin centripetal. Tsarin da ake amfani da shi don ƙarfin centripetal shine:

ΣF = ma_s

ΣF = mv²/r = m ω² r

Bayani: ΣF = ƙarfin centripetal, m = nauyin abu, v = saurin tangential, ω = saurin kusurwa, r = radius na hanyar da'ira.

ΣF = m ω² r = (0,2)(5)² (0,6) = (0,2)(25)(0,6) = 3 Newtons

Amsar da ta dace ita ce C.

2. Ɗalibi yana juya dutse da aka ɗaure a ƙarshen igiya. Ana juya dutsen a kwance kamar yadda aka nuna a sama. Idan aka ninka saurin juyawar dutsen sau biyu, ƙarfin tsakiya zai zama...

A. Sau 6 na asali

B. Sau 5 kuma

C. Sau 4 kuma

D. Sau 2 kuma

E. Sau 2 na asali

Tattaunawa

An san cewa:

Nauyin dutse = m

Gudun dutse = v

Tsawon igiya = radius = r

An tambaya: Idan aka ninka saurin sau biyu, ƙarfin centripetal zai zama…

Amsa:

Idan gudun ya ninka sau biyu, to ƙarfin centripetal zai zama:

Ƙarfin centripetal ya ninka na asali sau 4.

Amsar da ta dace ita ce C.

3. An tsara lanƙwasa a kan titi mai faɗi don mota ta yi tafiya a matsakaicin gudun mita 10/s.^-1An san cewa ma'aunin gogayya tsakanin tayar da hanya shine 0,5 kuma radius na lanƙwasa na hanya shine R m. Sannan ƙimar R shine…. (g = 10 ms^-2)

A. mita 7,5

B. mita 8,0

C. mita 10

D. mita 15

E. mita 20

Tattaunawa

An san cewa:

Gudun (v) = 10 m/s

Ma'aunin gogayya tsakanin taya da hanya (μ)_s) = 0,5

Saurin gudu saboda nauyi (g) = 10 m/s²

An tambaya: Radius na lanƙwasa na hanya (mita R)

Amsa:

Ƙarfin da ke fitowa kawai a cikin alkiblar kwance da ke aiki a kan motar lokacin da motar ta juya shine Ƙarfin gogayya mara motsiTsarin ƙarfin gogayya mai tsayayye:

4. Motar tana tuki a kan lanƙwasa a kan hanya a matsayi na M kamar yadda aka nuna a hoton da ke ƙasa.

Matsakaicin gogayya tsakanin ƙafafun da hanya shine 0,4 (haɓaka nauyi 10 ms^-2) Domin hana motar fita daga layin dogo, matsakaicin gudu da aka yarda da shi shine…

A. √10 ms^-1

B. 2√10 ms^-1

C. 4√10 ms^-1

D. 5√10 ms^-1

E. 6√10 ms^-1

Tattaunawa

An san cewa:

Matsakaicin gogayya mai tsayayye (μ)_s) = 0,4

Saurin gudu saboda nauyi (g) = 10 m/s²

Radius na lanƙwasa (R) = mita 40

An tambaya: matsakaicin gudu (v)

Amsa:

Tsarin dabara Dokar Newton ta biyu a kan motsi na zagaye iri ɗaya

Bayani:

ΣF = ƙarfin centripetal = ƙarfin sakamako = jimlar ƙarfi, m = nauyin abu, a_s = hanzarin centripetal, v = saurin layi, R = radius na lanƙwasa

Ƙarfin tsakiya

Ƙarfin centripetal shine ƙarfin da aka nuna zuwa tsakiyar hanyar da'ira. Lokacin da mota ke motsawa a cikin da'ira, ƙarfin da aka nuna zuwa tsakiya shine gogayya mai tsayi, don haka gogayya mai tsayi shine ƙarfin centripetal.

Tsarin ƙarfin gogayya mai tsayayye:

Bayani:

μ_s = ma'aunin gogayya mai tsauri, w = nauyin abu, m = nauyin abu, g = hanzari saboda nauyi.

Lissafa matsakaicin gudun (v):

Amsar da ta dace ita ce C.

Tushen tambaya:

Tambayoyin Nazarin Fizik na Ƙasa ga Makarantar Sakandare ta Babbar Sakandare/Makarantar Sakandare ta Sana'a