Barbashi a cikin daidaito mai girma biyu - aikace-aikacen matsalolin da mafita na dokar farko ta Newton

1. Nemo ƙarfin tashin hankali T ₁ , T ₂ , da T _{3. Yi watsi da} nauyin igiya.

Magani

(a) Zane-zanen jiki kyauta ga abu (b) Zane-zanen jiki kyauta ga igiya

Yi amfani da dokar farko ta Newton akan abu:

ΣF _y = 0

T ₁ – w = 0

T ₁ = w = mg

T ₁ = (kilogiram 5)(9.8 m/s ² )

T ₁ = 49 kg m/s ²

T ₁ = 49 N

Yi amfani da dokar farko ta Newton a kan igiyar:

∑ F _x = 0

T _3x – T _2x = 0

T ₃ cos 30 ^o – T ₂ cos 40 ^o = 0

0.87 T ₃ – 0.77 T ₂ = 0

0.87 T ₃ = 0.77 T ₂

T ₂ = 0.87 T ₃ / 0.77 = 1.1 T ₃ ———- Daidaito 1

[irp]

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∑ F _y = 0

T _3y + T _2y – T _1y = 0

T ₃ zunubi 30 ^o + T ₂ zunubi 40 ^o – T ₁ = 0

0.5 T ₃ + 0.64 T ₂ – 49 N = 0 ———- Daidaito na 2

Sauya T ₂ a cikin lissafin 2 zuwa lissafin 2:

0.5 T ₃ + 0.64 (1.1 T ₃ ) – 49 N = 0

0.5 T ₃ + 0.70 T ₃ – 49 = 0

1.2 T ₃ – 49 = 0

1.2 T ₃ = 49

T ₃ = 49 / 1.2

T ₃ = 41 N

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T ₂ = 1.1 T ₃

T ₂ = (1.1)(40.8 N)

T ₂ = 45 N

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1. Ƙwayoyin cuta a cikin ma'auni ɗaya
2. Ƙwayoyin cuta a cikin ma'auni mai girma biyu
3. Daidaiton jikin da aka haɗa ta hanyar igiyoyi da ƙwallo
4. Daidaiton jikin da ke kan jirgin sama mai karkata