An warware matsaloli a cikin dokokin motsi na Newton - Ƙarfin rikitar da ke tsakanin motsi da motsi
1. Wani abu yana rataye a kan ƙasa mai kwance. Ma'aunin gogayya mai motsi shine 0.4 kuma saurin nauyi shine 9.8 m/s 2. Ƙayyade (a) Matsakaicin ƙarfin gogayya mai motsi (b) Mafi ƙarancin ƙarfin F
Magani
An sani:
Nauyi (m) = 1 kg
Ma'aunin gogayya mai tsauri (μs ) = 0.4
Saurin nauyi (g) = 9.8 m/s 2
Nauyi (w) = mg = (1 kg)(10 m/s 2 ) = 10 kg m/s 2 = 10 Newtons
Ƙarfin al'ada (N) = w = Newtons 10
Ana so:
(a) Matsakaicin ƙarfin gogayya mai tsauri (b) Mafi ƙarancin ƙarfin F
Magani:
(a) Matsakaicin ƙarfin gogayya mai motsi
f s = μ s N
f s = (0.4)(9.8 N) = 3.92 Newtons
(b) Mafi ƙarancin ƙarfin F
Idan an yi amfani da ƙarfin F a kan abin amma abin bai motsa ba, to dole ne a sami ƙarfin gogayya mai tsayi da ƙasa ke yi a kan abin. Idan abin zai fara motsawa, kuma an wuce ƙarfin gogayya mai tsayi, dole ne a sami ƙarfin gogayya mai tsayi. Abu zai fara motsawa idan F ya fi ƙarfin gogayya mai tsayi.
Don haka mafi ƙarancin ƙarfin F = matsakaicin ƙarfin gogayya mai tsauri = 3.92 Newtons.
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2. Ana jan akwatin kilogiram 1 a saman kwance ta hanyar ƙarfin F, don haka akwatin yana motsawa a cikin saurin da ba ya canzawa. Idan ma'aunin gogayya na motsi shine 0.1, ƙayyade girman ƙarfin F! (g = 9.8 m/s 2 )
An sani:
Ma'aunin gogayya na motsi ( μk ) = 0.1
Nauyin akwati (m) = 1 kg
Saurin nauyi (g) = 9.8 m/s 2
Nauyi (w) = mg = (1 kg)(9.8 m/s 2 ) = 9.8 kg m/s 2 = 9.8 Newtons
Ƙarfin al'ada (N) = w = 9.8 Newtons
Ana nema : F
Magani:
Dokar farko ta Newton ta bayyana cewa idan babu wani ƙarfi da ke aiki a kan wani abu, kowane abu yana ci gaba da kasancewa a cikin yanayin hutawarsa, ko kuma saurinsa na yau da kullun a cikin layi madaidaiciya.
Don haka idan abin yana motsawa a daidai gudun , dole ne babu ƙarfin da ya wuce kima ( Σ F = 0) . Ana amfani da ƙarfi F akan abu a daidai hanyar da za ta sa ƙarfin gogayya mai motsi ya yi aiki akan abu zuwa hagu.
∑ F = 0
F – f k = 0
F = f k
Ƙarfin gogayya ta motsi:
f k = μ k N = (0.1) (9.8 N) = 0.98 Newtons
abu yana motsawa da saurin da ba ya canzawa, F = f k = 0.98 Newtons
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3. Wani abu yana zamewa ƙasa da wani jirgin sama mai karkata tare da saurin da ba ya canzawa. Ƙayyade ma'aunin gogayya na motsi ( μk ) . g = 9.8 m/s 2
Magani
w = nauyi, w x = ɓangaren nauyi a kwance, maki tare da karkata, w y = ɓangaren nauyi a tsaye, a tsaye zuwa ga matakin da aka karkata, N = ƙarfin al'ada, f k = ƙarfin gogayya ta motsi.
An sani:
Nauyi (m) = 1 kg
Saurin nauyi (g) = 9.8 m/s 2
nauyi (w) = mg = (1 kg)(9.8 m/s 2 ) = 9.8 kg m/s 2 = 9.8 Newtons
w x = w sin 30 o = (9.8 N)(0.5) = 4.9 Newtons
wy = w cos 30 o = (9.8 N)(0.5) √ 3 = 4.9 √ Newtons 3
Ƙarfin al'ada (N) = w y = 4.9 √ Newtons 3
Ana so : ma'aunin gogayya na motsi ( μk )
Magani:
Abu yana zamewa ƙasa da jirgin sama mai karkata tare da saurin da ya dace don ƙarfin raga = 0.
∑ F = 0
w x – f k = 0
w x = f k
w x = μ k N
5 = μ k ( 5 √ 3 )
μ k = 5/5 √ 3
μ k = 1 / √ 3
μ k = 0.58
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[wpdm_package id='472′]
- Nauyi da nauyi
- ƙarfin al'ada
- Dokar motsi ta biyu ta Newton
- Ƙarfin gogayya
- Motsi a saman kwance ba tare da ƙarfin gogayya ba
- Motsin jiki guda biyu tare da hanzari iri ɗaya a kan saman kwance mai tsauri tare da ƙarfin gogayya
- Motsi a kan jirgin sama mai karkata ba tare da ƙarfin gogayya ba
- Motsi a kan jirgin sama mai karkata mai ƙarfi tare da ƙarfin gogayya
- Motsi a cikin lif
- Motsin gawawwaki da aka haɗa ta hanyar igiyoyi da ƙwallo
- Jikuna biyu masu girman gudu iri ɗaya
- Zagaye lanƙwasa mai faɗi - yanayin motsi na zagaye
- Zagaye lanƙwasa mai banked - yanayin motsi na zagaye
- Motsi iri ɗaya a cikin da'irar kwance
- Ƙarfin tsakiya a cikin motsi na zagaye iri ɗaya
