moment of force

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moment of force

the rotational 'turning effect' of a force. Calculated as the product of the force and the perpendicular (i.e. at 90°) distance between the point of application (and direction) of the force and the pivot; also known as torque. net moment of force the mathematical result of all the moments applied to an object or body, taking into account the size and direction of the moments. See fig overleaf .


energy or power; that which originates or arrests motion or other activity.

electromotive force
the force that, by reason of differences in potential, causes a flow of electricity from one place to another, giving rise to an electric current.
moment of force
the effect of a force exerted on a lever and about a fixed point.
reserve force
energy above that required for normal functioning. In the heart it is the power that will take care of the additional circulatory burden imposed by bodily exertion.
shearing force
a force exerted perpendicularly to a horizontal surface.
Van der Waals f's
the relatively weak, short-range forces of attraction existing between atoms and molecules, which results in the attraction of nonpolar organic compounds to each other (hydrophobic bonding).