Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
edirection is unaltered. In the second case, the resultant is the difference of the forces, andtakes the direction of the greater. If they be equal, no motion is pro-duced. In the third case, a resultant is found to two of the forces by tlieparallelogram of forces, according to the following law,… … If a force act on the ball L in the direction of and equal to the lineX, it Avill pass over this line ; but if there be simultaneously appliedto the ball another force, in the direction of and equal to the line E,it Avill pass over the dotted diagonal line V; and, by the joint actionof the two…
Physics · Astronomy
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