Merchant, F. W. (Francis Walter), 1855-1937 · Toronto : Copp, Clark · leaf 47
angle whose base isthe line representing the force and whose vertex is thepoint about which the moment is taken. 3. Principle of Moments. The algebraic sum of the moments of any two forcesabout any point in their plane is equal to the moment oftheir resultant about the same point.3 34 SUPPLEMENT TO… … Fig. 10. Fig. 11. Let O be any point in their plane. Through O draw OD parallel to AP, meeting AQ andAR in C and D respectively. Through D draw DB parallel to AQ. Then AB, AC, AD will completely represent P, Q, R,respectively (Art. 6, page 34, Part II).Join OA, OB. Then Moment of P about O - 2AOAB…
Mechanics
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