Engineering Mechanics
A force while acting on a body may

Balance the forces, already acting on it
All of these
Change its motion
Give rise to the internal stresses in it

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Engineering Mechanics
The moment of a force

Is the turning effect produced by a force, on the body, on which it acts
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
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

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