Homework Answers
Given L=23 feet, Mc=638 kip.ft
To find vertical reaction at A(VA) = ?
Lets first calculate the vertical reaction/forces act on beam
Consider V=Vertical , VA & VB vertical reaction/forces act at point A and B respectively
VA + VB = 0
VA +
Same for Horizonatal reaction/forces , H=Horizontal , HA & HB , horizontal reactiom/forces at point A and B respectively
HA + HB = 0
Since we not need to find our horizontal reaction.
Now calculate moment act on pont A , Taking anticlockwise negative(-) , clockwise positive(+)
Mc + VB(0.5L + 0.5L ) = 0
now put the value
-638 + {- VB(1.0 * L )} = 0
-638 + {- VB(1.0 * 23 )} = 0
- 23VB = 638
VB = - 27.73
Now put VB value in vertical reaction equation as we write in starting
VA + VB = 0
VA + (- 27.73) = 0
VA = 27.73 is answer
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