When Dealing with mechanical principles the term 'Static Equilibrium' is mentioned, but what is it??
Static equilibrium is the expression used for when forces or loads
acting upon an object an object are balanced in a way so that the object is not
in motion.
For static equilibrium the following statements must be true:
- ΣM=0 (This
means that clockwise turning motions and counter clockwise motions are
equal.)
- ΣFy=0 (This means
that upwards, + forces and downwards, - forces are equal.)
- ΣFx=0 (This means
that rightwards, + forces and leftwards, - forces are equal.)
The best, most understandable
example of static equilibrium that I have seen is of two children on a see-saw.
When the see-saw is still and is in static equilibrium, the force that is being
pushed up through the centre of the base is equal to that of the force created
by the children.
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