Engineering Mechanics
The forces which do not meet at one point and their lines of action do not lie on the same plane are known as

Non-coplanar concurrent forces
Coplanar concurrent forces
Coplanar non-concurrent forces
None of these

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Engineering Mechanics
The moment of a force

All of these
Is equal to twice the area of the triangle, whose base is the line representing the force and whose vertex is the point, about which the moment is taken
Is equal to the product of force acting on the body and the perpendicular distance of a point and the line of action of the force
Is the turning effect produced by a force, on the body, on which it acts

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