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PANDUAN POLIGON 4 GAYA

PANDUAN POLIGON 4 GAYA. PANDUAN POLIGON 4 GAYA. F 3. F 4. C. D. A. B. F 1. F 2. F 2 = 65 kN. 1. Identifikasi dimensi benda / komponen. Jarak AB = 4.76 cm Jarak B C = 4.90 cm Jarak CD = 3.70 cm Jarak AD = 2.38 cm. C. D. A. B. 2. Buat Skala Gambar.

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PANDUAN POLIGON 4 GAYA

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  1. PANDUAN POLIGON 4 GAYA

  2. PANDUAN POLIGON 4 GAYA F3 F4 C D A B F1 F2 F2 = 65 kN

  3. 1. Identifikasidimensibenda/komponen • Jarak AB = 4.76 cm • JarakBC = 4.90 cm • Jarak CD = 3.70 cm • Jarak AD = 2.38 cm C D A B

  4. 2. BuatSkalaGambar Perhatikanukuranterbesardanterkecil !! Misalandainginmenggambarkanjarak AD (2.38 cm) menjadi4 cm dikertas. 4 cm : 2.38 cm 1 cm : 0.595 cm 1 mm : 0.0595 cm

  5. BuatGambarTerskalabesertagaya-gayanya F3 F4 C D A B F1 F2 Skalagambar = 1 cm : 0.595 cm

  6. 3. TerapkanpersamaanKeseimbangan

  7. Quest ! • Apakahadaygperludireduksi ? • Mencariresultangaya-gaya yang diketahuilengkap • Buatpoligongaya OK ? • Terapkanpersamaankeseimbangankedua.

  8. Prosesreduksigayamenggunakanpersamaanmomen F3 F4 C D r A s B F1 F2 Skalagambar = 1 cm : 0.595 cm

  9. Mencarilenganmomen F2dan F3 F3 Misallenganmomen F2terhadap r diberinama x danlenganmomen F3terhadap r diberinama y. Kemudiankitaukurpanjang x dan y darigambar, lalukalikandenganskalagambarnya. C D r A s B F2 Dari pengukuran: x = 0.53 cm. 0.53 x 0.595 = 0.32 cm Dari pengukuran: y = 2.37 cm. 2.37 x 0.595 = 1.41 cm Skalagambar = 1 cm : 0.595 cm

  10. 3. Terapkanpersamaanmomen

  11. 4. BuatPoligon Gaya • BuatSkala Gaya terlebihdahulu, perhatikanbesargaya-gaya yang diketahui(65 kNdan 14.48 kN) Misalandainginmenggambarkangaya F2 (65 kN) menjadi6,5 cm dikertas. • 6,5 cm : 65 kN • 1 cm : 10 kN • 1 mm : 1 kN

  12. 5. Poligon Gaya Poligongayaselaludimulaidengantitik OF

  13. F1 F3 F4 F2 OF Skalagaya = 1 mm : 1 kN

  14. F3 F1 F2 F4 OF Skalagaya = 1 mm : 1 kN

  15. F3 F1 F2 F4 OF Skalagaya = 1 mm : 1 kN

  16. 6. Ukurgayahasilpoligon F1 Dari poligon : F1 = 0.82 cm  0.82 x 10 kN = 8.2 kN F4 = 4.93 cm  4.93 x 10 kN = 49.3 kN F3 F1 OF F2 F4 F4

  17. Slametmencobi…

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