engr-36_prob_4_5_32_acad_ 1 bruce mayer, pe engineering-36: engineering mechanics - statics bruce...
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BMayer@ChabotCollege.edu • ENGR-36_Prob_4_5_32_ACAD_Solution.ppt1
Bruce Mayer, PE Engineering-36: Engineering Mechanics - Statics
Bruce Mayer, PELicensed Electrical & Mechanical Engineer
BMayer@ChabotCollege.edu
Engineering 36
Problem Problem 4.5.324.5.32Vector Vector
DeCompDeComp
BMayer@ChabotCollege.edu • ENGR-36_Prob_4_5_32_ACAD_Solution.ppt2
Bruce Mayer, PE Engineering-36: Engineering Mechanics - Statics
Problem 4.5.32Problem 4.5.32 Find
• Fx• Fy• Fu• Fv
By• AutoCAD• MATLAB
BMayer@ChabotCollege.edu • ENGR-36_Prob_4_5_32_ACAD_Solution.ppt3
Bruce Mayer, PE Engineering-36: Engineering Mechanics - Statics
Problem 4.5.32 Problem 4.5.32 AutoCAD AutoCAD ReCreate File P4_5_32_FULL_scale_1009.dwg
x
u
vy
500N
367.47
204.87
394.01
307.83
Fv
Fu
Law of Sines Calc
x
u
vy
500N
BMayer@ChabotCollege.edu • ENGR-36_Prob_4_5_32_ACAD_Solution.ppt4
Bruce Mayer, PE Engineering-36: Engineering Mechanics - Statics
Problem 4.5.32 Problem 4.5.32 MATLAB MATLAB By Law of Sines
Fv
Fu
Law of Sines Calc
Using MATLAB
119sin21sinN500
119sin04sinN500
21sin04sin119sinN500
vu
vu
FFor
FF
>> Fu = sind(40)*500/sind(119)Fu = 367.4669>> Fv = sind(21)*500/sind(119)Fv = 204.8707
BMayer@ChabotCollege.edu • ENGR-36_Prob_4_5_32_ACAD_Solution.ppt5
Bruce Mayer, PE Engineering-36: Engineering Mechanics - Statics
Pythagorus Pythagorus Yea or Nay? Yea or Nay? Test Pythagorean Theorem on Both SetsFu = sind(40)*500/sind(119)Fv = sind(21)*500/sind(119)Fx = 500*cosd(38)Fy = 500*sind(38)MagFxy = sqrt(Fx^2+Fy^2)MagFuv = sqrt(Fu^2+Fv^2)Fu = 367.4669Fv = 204.8707Fx = 394.0054Fy = 307.8307MagFxy = 500MagFuv = 420.7184
Since the uv Basis is NOT OrthoGonal, then Pythagorus does NOT hold
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