M1.4.6 Moments and equilibrium

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Purpose

This resource illustrates the conditions for a rigid body to be in equilibrium - that the resultant force in any direction must be zero, and the sum od the moments about any point must be zero.

It shows a simple case of three parallel forces, orthogonal to a rod.

Using this script

Use the blue stepper to show the conditions. In the final stage, moments are taken about point A, since this allows the force at A to be ignored, simplifying the equation.


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