## Elements of Natural Philosophy, Part 1 |

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Page 58

Hence the augmentation of

British Isles is at most about 12000 of its whole amount in any locality . The

average for the whole of Great Britain and Ireland differs certainly but little from

32-2 .

Hence the augmentation of

**gravity**per degree from south to north throughout theBritish Isles is at most about 12000 of its whole amount in any locality . The

average for the whole of Great Britain and Ireland differs certainly but little from

32-2 .

Page 60

The term Centre of

the resultant action of

shows that , except in a definite class of distributions of matter , there is no fixed

point ...

The term Centre of

**Gravity**is often very inconveniently used for it . The theory ofthe resultant action of

**gravity**, which will be given under Abstract Dynamics ,shows that , except in a definite class of distributions of matter , there is no fixed

point ...

Page 73

When part of the work is done against molecular forces , as in bending a spring ;

or against

the weight , are capable at any future time , of reproducing the work originally ...

When part of the work is done against molecular forces , as in bending a spring ;

or against

**gravity**, as in raising a weight ; the recoil of the spring , and the fall ofthe weight , are capable at any future time , of reproducing the work originally ...

Page 79

Practically , any mass of moderate dimensions is in neutral equilibrium when its

centre of inertia only is fixed , since , when its longest dimension is small in

comparison with the earth's radius ,

Practically , any mass of moderate dimensions is in neutral equilibrium when its

centre of inertia only is fixed , since , when its longest dimension is small in

comparison with the earth's radius ,

**gravity**is , as we shall see , approximately ... Page 81

Neither

therefore the whole momentum at the end of the blow is sensibly equal to the

amount of the impact , which is , in this case , simply the timeintegral 263. Such is

the ...

Neither

**gravity**nor any other force sensibly alters the effect of the blow . Andtherefore the whole momentum at the end of the blow is sensibly equal to the

amount of the impact , which is , in this case , simply the timeintegral 263. Such is

the ...

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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 experience 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 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