Barton, Edwin H. (Edwin Henry), b. 1858 · London, Macmillan and Co., limited · leaf 112
lelism to PT. Then Q will accordingly describe with 57 KINEMATICS 93 an equal constant angular velocity another precisely similarspiral, but with radius-vector p times that of the first.Moreover, this second spiral is the hodograph of the first,i.e. its radius-vector SQ is always equal to the… … Fig. 31.—Acceleration in Spiral. parallel to PT, cutting PS in V ; the whole acceleration PUmay be resolved into PV and VU. Further, PVU is anisosceles triangle whose base angles at U and V are each equalto the angle a. (The angles a, taken in the order in whichtheir equality may be readily seen,…
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