Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 580
triangle AaD is equal to the triangle A(xB, these moments are equal, and they tend to turn the body in opposite directions. Moments are called positive or negative according to thedirection of their rotation : if in the direction in which thehands of a clock move, they are called positive; and if… … 1. Determine the moment of each force with reference to a point D in the middle of the line CB. 2. Determine a point about which each force has equal moments of ojyposite signs. Unit \ = 1 lb. Fig. 346. 1. Draw DE and DF per-pendicular to the forces P andQ. Then P X DF and Q x DEare the moments of…
Geometrical drawing
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