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Homework Statement
A horizontal piece of wood that has a weight 40N is held in equilibrium by two brackets, A and B. The wood is 1.6m long (CD). A is 0.4m from C and B is 0.2m from D. Meaning that there is 1.0m between A and B. At rest the reaction force at A is 24 N and at B 16N. When an object is put on the wood at xm from C, show that the vertical reaction force on the shelf at A is (24-W(x-1.4))N
Homework Equations
Moment=Force x Distance
The Attempt at a Solution
I understand that the W(x-1.4) is the moment of the object but I can't seem to get the 24.
If taking moments about B:
(x-1.4)W + (24 x 1) = 40 x 0.6
which isn't right
Any help at all would be greatly appreciated. many thanks.