单词	moment of a force
释义	moment of a force A measure of the turning effect produced by a force about an axis. The magnitude of the moment is the product of the force and the perpendicular distance from the axis to the line of action of the force. An object will be in rotational equilibrium if the algebraic sum of all the moments of the forces on it about any axis is zero. See illustration. Moment of a force. For equilibrium mgb + F2 (b + c) = F1a, where mg is the weight of the beam acting through its centre of mass
随便看	CP invariance CPT theorem CPU creep critical angle critical damping critical mass critical pressure critical reaction critical state critical temperature critical volume CRO Crookes, Sir William cross product cross section crucible cryogenic pump cryogenics cryohydrate cryometer cryoscopic constant cryostat cryotron crystal

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