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Physics, 21.12.2020 17:40 autumnravenaj

Cine rezolva dau coroana va rogg bana la 6 pls 1. Reprezentaţi grafic prin vectori următoarele forţe:
a) F 1 = 48N, verticală, în jos (1cm ↔ 8N) b) F 2 =2,5N, orizontală, spre stânga (1cm ↔ 0,5N) (1,5p)
c) Aflaţi suma vectorială dintre 1F

şi o forţă 3F

(F 3 = 16N, verticală, în sus) (1,5p)
d) Determinaţi grafic rezultanta dintre 2F şi o forţă concurentă 4F , oblică, făcând un unghi de 60 0 cu 2F şi
cu valoarea numerică F 4 = 2N (2p)
2. Aflaţi şi reprezentaţi grafic folosind o scară convenabilă tensiunea dintr-un fir de care este suspendat
un cub din sticlă (ρ=2500kg/m 3 ), cu latura 2dm.

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