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)
- , or G num. pulleys X 2 W „ 24 r-, or 6 = -— num. cords 4 2 X 2and and W = P X twice number pulleys; or, 24 —6 X (2 X 2); and W = P X number cords;or, 24 = 6 X 4; and number cords = -^; or, Or, as the weight is sustained by four cords. MECHANICAL POWERS. 69 and all being parts of the same cord,…
Physics · Astronomy
Internet Archive · University of Connecticut Library · Public Domain Mark 1.0. Free to use for anything.
