Let, as before, AB be the position of equilibrium, ACand A C the extreme elongations. For the angular velocity at any intermediate positionAP, we shall have by the preceding Article \ Mai = G (cos 6 - cos a), where 0 = PAB and a = CAB. If the disturbing force be very small the elongation will also… … describe a semiGircle and raise perpeadieulars, PN, QM, anddraw MB parallel to BG. Join BM, BN. Then = G (BN - BP) = G. PN;Hence time of describing the arc PQ A PAQ PQ / G M PN M PQG PN But b}^ similar triangles PQ : MN:: PN: BN, . PQ MN .r. ■PN^BW^^^ IM a.-. time of describing PQ=\J -g,-MBN.…
Electricity
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