Physics Theory : Stability & Moments
Three kinds of equilibrium fundamentally exist. They are :
Two equal and opposite forces acting at a point are said to be in equilibrium because they balance each other.
Three forces in equilibrium, acting at a point, can be represented in magnitude and direction by the sides of a triangle taken in order.
Parallelogram of Forces is the famous theorem that can be used to determine the resultant of two forces acting at a point.
Components are defined as the two forces (acting at right angles) that any singular force can be decomposed into.
Moment of a force is defined as the product of the force and the moment arm, where the moment arm is the shortest distance from a point to the line of action of the force.
Center of gravity of a body is the point where all its weight appears to be concentrated.

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