A body can remain non-rotating only if all the moments acting on it sum up to zero. For a body to be in **rotational equilibrium**, it is necessary that

If we restrict ourselves to 2D problems, simplifies into

Sum of clockwise moments = Sum of anti-clockwise moments

Example

A hinged uniform rod of length *L* is held stationary at an angle of 22° by two forces: *F*_{1} and *F*_{2} applied at the end and midpoint of the rod respectively. Calculate the ratio of the magnitude of *F*_{1} to *F*_{2}.

Solution

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**Example Problem**

Hinged Beam

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