The Cambridge course of elementary natural philosophy; being the demonstrations of the propositions in mechanics and hydrostatics in which those persons who are not candidates for honours are examined for the degree of B.A (1844)
Snowball, John Charles, d. 1855 · Cambridge [Eng.] T. Stevenson; [etc., etc.] · leaf 42
d the tri-angles A CM and BCN are equiangular, and .-. similar. Now, supposing P to act on the horizontal lever MCNat M at right angles to CM, (Art. 15), and Q to act at^ N at right angles to CN, since * The heavy points spoken of in this Proposition and the next,are exceedingly small material… … 40 MECHANICS. P : Q :: CB : CA :: CN : CM, by similar triangles, therefore P and Q will balance on a fulcrum placed at C,and the pressure on C is P + Q, acting vertically. Props, u.and vu. And this, being true for any position, is true for allpositions of A and B. Wherefore, by the definition of…
Statics · Hydrostatics
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