Sample Exam Problem 2 Help | EM223 Statics | NEGAHBAN

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The discussion focuses on solving Problem 2 from the EM223 Statics sample exam, specifically addressing the summation of forces and moments. The key equations provided include the summation of forces in the y-direction, represented as Sum Fy=0, and the moment about point 1, expressed as Sum M1=0. The integrals used to calculate the forces and moments involve the weights w1 and w2, with a total force of 12000 lbs calculated over the interval from 0 to 35 inches. Participants are encouraged to utilize common shape area formulas to simplify the integration process.

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I am trying to solve the problems on a sample exam, I am stuck on Problem 2, can anyone help? I can't get to help until tomorrow!

Thanks!

http://em-ntserver.unl.edu/NEGAHBAN/EM223/sexam2/sexam2.htm
 
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sum the forces in y, and the moment about point 1

define the point at which w1 acts as point 1, x=0
define the point at which w2 acts as point 2, x=35

Sum Fy=0

integral from 0 to 35 of [(w2-w1)/35in)x+w1]dx = 12000lbs


Sum M1=0

integral from 0 to 35 of x[(w2-w1)/35in)x+w1]dx - (14in)(12000lbs) = 0

I'll let you mess with the integration and solve for the two variables (or you can be crafty and replace the integrations with common shape area formulae)
 
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Welcome to the forums, eedayspa.

In the future, please post homework questions to the homework help forum, and also post what you've tried.
 

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