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In the second diagram, at the point $x$ what is the moment due to the axial force?
The mathematics behind moments of forces are typically covered in early A-level Mechanics modules. The methods for solving 2nd order differential equations are typically done in the A-level module FP2.
Euler's Buckling Formula
Age 16 to 18
Challenge Level 
In the second diagram, at the point $x$ what is the moment due to the axial force?
The mathematics behind moments of forces are typically covered in early A-level Mechanics modules. The methods for solving 2nd order differential equations are typically done in the A-level module FP2.
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