Determine the magnitude and coordinate direction angles of F3. Hibbeler Statics | Engineers Academy

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Engineering Statics by Hibbeler 14th Edition
Chapter 2: Force Vectors
*2–68. Determine the magnitude and coordinate direction angles of F3 so that the resultant of the three forces is zero.

Cartesian Vector Representation
Magnitude of Cartesian Vector
Coordinate Direction Angles
transverse and Azimuth angles

Determine the magnitude and coordinate direction angles of F3. Hibbeler Statics | Engineers Academy
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Комментарии
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bro, in f3y, you didn't multiply by cos 40°, so f3y= -199 lb in 6:54

DanielSousa-bggv
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Thank you sir for your time. Would you please help me understand when to use cos and when it is appropriate to use sine… example for the component of Z, I thought we used sin 40 because it’s in the opposite direction. Why did we add the inverse as well?? I’m just lost and a hand will be appreciated. Thanks!

kerenhappuch
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You're also supposed to use 250 lb in the denominator at the end instead of 300 lb

benbarnes
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I don't understand how F1 is in the X direction. It's clearly in the zy plane

needhelp