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)
ensions. Weight.—The fall of a body to the earth, and its downward pres-sure upon the earths surface, are due to the force of gravity ; and theamount of this pressure is called the iveight of the body. ^0. Figure 5.—Centre of gravity of bodies.—The centreof gravity of a body is that point through… … Fig. 5. together, they may be re- garded as one body, havingbut one centie of gravity. Ifthe fulcrum, T, supports thecentre of gravity of the twobodies, they will remain atrest; and this point, if thebodies are of equal weight,will be in the middle of theline which unites them(measuring from the…
Physics · Astronomy
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