Question

Problem 2.78 Part A The two forces Fi and F2 acting at A have a resultant force of FR={-180 k lb. (Figure 1) Determine the magnitude of F2. Express your answer to three significant figures and include the appropriate units. Value Units Submit Request Answer Figure 1 of 1 Part B Determine the coordinate direction angle a of F2. Express your answer using three significant figures. VA Tvec 30 ? 40 F 60 lb Submit Request Answer Part C Determine the coordinate direction angle Bof F2 Express your answer using three significant figures. Πνα ΑΣφ ve ? B = Request Answer Submit Part D Determine the coordinate direction angle y of F2 Express your answer using three significant figures. 1 ΑΣφ ? vec Request Answer Submit

Answer 1

Given teaut FR F+ 18613 avesn diagrasen- stnns Fこ 38.56a us-3624 FR FIF2 -18 38-56311 1s.ac2 F2 80 F2- 38-5 us-362 1861 38-SC3 Cas.563)24-us.ac2)21-1e Cud 38.567 t.2b32 ( B9.736

Cesfニ 215-962 b. 2u22) 183- 736 cos 0.2422) Sこ 1b4.61 cos 18セ 486 (89.736 21cos(-b.g18) 213 161-5650