E MastenngEngneering MastenngComputerScience: Homework Set #2 Google Chrome secu
ID: 1655064 • Letter: E
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E MastenngEngneering MastenngComputerScience: Homework Set #2 Google Chrome secure https; session mastenngengineering.com/myct/itemView?assignmentProblemID-6339779&offset;=next Homwork Set2 Problem 2.82 E previous 1 8 of 13 I nexd s Problem 2.82 the magnitude of the resultant force acting on the eyebot (Fiqure 1 Express your answer to three significant figures and include the appropriate units FR 1350 lb MLArswern Give Up All attempts used; correct answer displayed Not quite. Check through your calculations, you may have made a rounding error or used the wrong number of significant igures. Part B Determine coordinate direction angle of the resultant tone Express your answer to three significant figures and include the appropriate units. ae Units Submit My Answers Give Part C Determine coordinate drecton angle of the resultant torce Express your answer to three significant figures and include the appropriate units B Value Units of 1 Submit My Answers Sie Up Part D Determine coordinate direction angle ofthe resultat force Express your answer to three significant figures and include the appropriate units. 30 Value Units F 700 tb Submit My Answers Give.Explanation / Answer
F1 = 700 lb ( cos30i + sin30 j)
F1 = 606.2i + 350j lb
F2 = 600 (4/5 j + 3/5 k) = 480j + 360k lb
F3 = 710(cos140i + cos60j + cos66 k)
F3 = - 544i + 355j + 289 k lb
FR = F1 + F2 + F3
FR = 62.2i + 1185j + 649k
(A) Magnitude = sqrt[ 62.2^2 + 1185^2 + 649^2]
= 1352 lb
in 3 significant numbers
Ans: 1350 lb
(B) alpha = cos^-1 [ 62.2 / 1352] = 87.4 deg
(C) beta = cos^-1 [ 1185 / 1352.5] = 28.8 deg
(D) gamma= cos^-1 [ 649 / 1352.5] = 61.3 deg
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