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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)

Johnson, Frank G., 1835- · Chicago, A.H. Andrews · leaf 49

An illustration from 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, leaf 49
lf, to return to that state. A rock-ing-chair is a case of this kind. A body is in unstable equilibrium when, on being slightly disturbedfrom its state of rest, it does not tend to return to that state, but con-tinues to depart from that state more and more. A body is in a neutral equilibrium when,… … Method of finding the centre of gravity of irregular shaped bodies. Let the ob-ject be freely suspended from some point,as H, and the centre of gravity will fallinto the vertical line HV (marked byplummet and line). If now the body befreely suspended from some other point,as T, the centre of…

Physics · Astronomy

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