A Treatise on the Theory of Screws

Forfatter: Sir Robert Stawell Ball

År: 1900

Forlag: The University Press

Sted: Cambride

Sider: 544

UDK: 531.1

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81] THE PRINCIPAL SCREWS OF INERTIA. 71 80. Impulsive Screws and Instantaneous Screws. If a free quiescent rigid body receive an impulsive wrench on a screw ?/, the body will immediately commence to twist about an instantaneous screw a. The co-ordinates of a being given for the six screws of reference just defined, we now seek the coordinates of The impulsive wrench on ?; of intensity »/" is to be decomposed into com- ponents of intensities y'"ylt ... y'"ye on ay, ... a>0. The component on a>n will generate a twist velocity about