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Jan17-13, 03:11 PM
P: 5,462
Especially in incision 2, when they find Mb, they have used: Mb = FA*aA-q*2.5m*1.25.
Please confirm what the symbols stand for.

In particular what is aA and Mb ?

You have not provided symbols for the reactions at A and B?
Do you know how to calculate these reactions?

You should start by writing the equation for the bending moments for 16.2 and 16.3, using x for the horizontal axis and starting with x=0 at A. Can you do this?
It will have the form M = some function of x and the loads to the left of x.