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	tomography topological invariant topology torque torr Torricellian vacuum torsion torsion balance torus total internal reflection total-radiation pyrometer totality tracing trajectory transactinide element transcendental number transducer transformer transient transistor transition point translation translucent transmission coefficient transmission electron microscope

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