Introductory course of natural philosophy for the use of schools and academies. Ed. from Ganot's popular physics. By William G. Peck (1869)
Ganot, Adolphe, 1804-1887, Peck, William Guy, 1820-1892 · New York A.S. Barnes · leaf 44
the surface.For ordinary purposes, however, we may regard the earth as a per-fect sphere, and the force of gravity as constant all over its surface. Vertical and Horizontal Lines. 37. A Vertical Line is a line along which a bodyfalls freely. All vertical lines are directed towards thecentre of the… … F%. 21. parallel. If, however, their distance apart is considerable, they cannot be regarded as parallel. A man standing erect has his body in What is t.e shape of the earth? (37.) What is a Vertical Line ? Where dorerticals meet» When may they be considered parallel ? When not parallel t…
Physics
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