Twisden, John Francis · London, Longmans, Green, and Co. · leaf 186
ver, the body is attached to a thread, andmade to move in a vertical circle, the formula is true; forthe constraining force from the centre acts along the thread at right angles to thedirection of the motion, andtherefore (like the reaction ofa smootli ciuve) does no work.126. Body onoving ina… … zontal lines P N, Q M, and the chords a p, a Q.from the last article that i;2 = 2g . M N.Also we know from geometry that AP2=:AB . AN and Aq2=A B.AM. We know Therefore MN = AP 2 AQ A B Ap2 —AQ2 2r PENDULUMS. 171 where r denotes the radius of the circle. Hence T It is plain from this that the…
Mechanics, Analytic
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