How are Shear and Bending Moment Equations Derived from Distributed Loads?

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liwolf
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Homework Statement


draw/find the shear and bending moment diagrams of:
Untitled-1.jpg


Homework Equations


asd-1.jpg

V : shear
M : bending moment
ω : distributed load

The Attempt at a Solution


i already understood how the solution worked but i can't quite understand how the equations with the boxes were derived
 
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