## Elements of Natural Philosophy, Volume 1 |

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Page 1

In Statics the action of force in maintaining rest , or preventing change of motion ,

the balancing of forces , ' or

force in producing or in changing motion . 4. In Kinetics it is not mere motion ...

In Statics the action of force in maintaining rest , or preventing change of motion ,

the balancing of forces , ' or

**Equilibrium**, is investigated ; in Kinetics , the action offorce in producing or in changing motion . 4. In Kinetics it is not mere motion ...

Page 22

The amount of the lunar tide in the

the solar . Hence the spring tides of this theory are 3.1 , and the neap tides only

1.1 , each reckoned in terms of the solar tide ; and at spring and neap tides the ...

The amount of the lunar tide in the

**equilibrium**theory is about 2 : 1 times that ofthe solar . Hence the spring tides of this theory are 3.1 , and the neap tides only

1.1 , each reckoned in terms of the solar tide ; and at spring and neap tides the ...

Page 67

The case of the

deducible at once from this ; for if we introduce one other force equal and

opposite to their resultant , this will produce a change of motion equal and

opposite to ...

The case of the

**equilibrium**of a number of forces acting at one point , is evidentlydeducible at once from this ; for if we introduce one other force equal and

opposite to their resultant , this will produce a change of motion equal and

opposite to ...

Page 69

In other words , it must be in

amounts to this , that all the forces of the system , with the reactions against

acceleration of the material points composing it , form groups of equilibrating

systems ...

In other words , it must be in

**equilibrium**with these forces . Hence Newton's viewamounts to this , that all the forces of the system , with the reactions against

acceleration of the material points composing it , form groups of equilibrating

systems ...

Page 70

principle of superposition of forces in

of the system form , with the reactions against acceleration , an equilibrating set

of forces on the whole system . This is the celebrated principle first explicitly

stated ...

principle of superposition of forces in

**equilibrium**, all the forces acting on pointsof the system form , with the reactions against acceleration , an equilibrating set

of forces on the whole system . This is the celebrated principle first explicitly

stated ...

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### Common terms and phrases

acceleration according acting action amount angle angular applied attraction axes axis body called centre centre of inertia circle component condition consider constant corresponding couple course curvature curve denote density described determined direction displacement distance divided effect elastic elements energy equal equations equilibrium evidently expression figure fixed fluid force friction give given gravity harmonic Hence important increase infinitely small instant interval kinetic length less mass matter mean measured method motion moving natural normal observation opposite parallel particle passing path perpendicular plane portion position potential practical pressure principle problem produce projection proportional quantity radius reference relative remain remarkable respectively rest resultant right angles rigid rotation round sides simple solid space spherical square straight strain stress suppose surface theory turned uniform unit velocity weight whole wire