Physics
In figure below, a uniform bar of length l m is supported at its ends and loaded by a weight W kgf at its middle. In equilibrium, find the reactions R1 and R2 at the ends.
Force
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Answer
As we know, the principle of moments states that
Anticlockwise moment = Clockwise moment
R1 + R2 = W
Given, the system is in equilibrium so
Since, R1 = R2 and 2R1 = W
Therefore, R1 = W/2 = R2
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