8 -11 points L This question has several parts that must be completed sequential

Question

8 -11 points L This question has several parts that must be completed sequentially. If you skip a part of the 11 11.1.078 MI SA , you will not receive any points for t Three forces with magnitudes of 430 newtons, 290 newtons, and 390 newtons act on an object at angles of -30°, 45°, and 135° respectively, with the positive x-axis. Find the direction and magnitude of the resultant force. Step 1 LetFi, F2 and F3 be the three forces making angles ?, ?2 and ?3 with the positive direction of x-axis such that Fill 430 newtons and ,0 ll Fall 290 newtons and ?2-450 F3ll 390 newtons and 6 135 The forces F,, F2 and F, can be written in terms of the standard unit vectors as F, |Fill(cos(-30)isin(-30°)j) oji + sin(450)) )i+ sin o)j)

Explanation / Answer

F1= ||F1||{cos(-30o) i+sin(-30o) j }

F2= ||F2||{cos(45o) i+sin(45o) j }

F3= ||F3||{cos(135o) i+sin(135o) j }

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