A text book of elementary mechanics, for the use of colleges and schools (1881)
Dana, Edward Salisbury, 1849-1935 · New York, J. Wiley & sons · leaf 63
o that AB = igt\ (2) But as shown above (46), as the body must obey bothtendencies to motion simultaneously, its actual position.at the given time will be at C. Squaring (1) and dividing by (2), we have AD* _ W t£f _ 2^2 AB \ABr iff g or BO 2v? 9 . AB Therefore the ratio of the square of the… … Fig. 22. cal line FAB is a diameter. The constant value of the is four times the distance from A ratio of BC2 2ri A B \ 9 to the directrix or to the focus. The same relation is at 49.] PEOJECTILES. 45 once obyious in the case of the parabola, whose equationis if = iax (i.e. —- = ia); it may also be…
Mechanics
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