## Elements of Natural Philosophy |

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Page 1

The science which investigates the

writers , DYNAMICS . It is commonly , but erroneously , called MECHANICS ; a

term employed by Newton in its true sense , the Science of Machines , and the art

...

The science which investigates the

**action**of Force is called , by the most logicalwriters , DYNAMICS . It is commonly , but erroneously , called MECHANICS ; a

term employed by Newton in its true sense , the Science of Machines , and the art

...

Page 2

If the motion be that of a material particle , however , there can be no abrupt

change of velocity , nor of direction unless where the velocity is zero , since ( as

we shall afterwards see ) such would imply the

useful to ...

If the motion be that of a material particle , however , there can be no abrupt

change of velocity , nor of direction unless where the velocity is zero , since ( as

we shall afterwards see ) such would imply the

**action**of an infinite force . It isuseful to ...

Page 11

43 . With uniform acceleration in the direction of motion , a point describes

spaces proportional to the squares of the times elapsed since the

commencement of the motion . This is the case of a body falling vertically in

vacuo under the

43 . With uniform acceleration in the direction of motion , a point describes

spaces proportional to the squares of the times elapsed since the

commencement of the motion . This is the case of a body falling vertically in

vacuo under the

**action**of ... Page 37

... a body be rotating about an axis , and be subjected to an

produce rotation about a perpendicular axis , the result will be a change of

direction of the axis about which the body revolves , but no change in the angular

velocity .

... a body be rotating about an axis , and be subjected to an

**action**tending toproduce rotation about a perpendicular axis , the result will be a change of

direction of the axis about which the body revolves , but no change in the angular

velocity .

Page 51

... be neither annihilation nor generation of matter in any natural motion or

the whole quantity of a fluid within any space at any time must be equal to the

quantity originally in that space , increased by the whole quantity that has entered

...

... be neither annihilation nor generation of matter in any natural motion or

**action**,the whole quantity of a fluid within any space at any time must be equal to the

quantity originally in that space , increased by the whole quantity that has entered

...

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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 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 period perpendicular plane portion position potential practical pressure principle produce projection proportional quantity radius reference relative remain remarkable resistance respectively rest resultant right angles rigid rotation round sides simple solid space spherical square straight strain stress suppose surface theory turned uniform unit velocity vertical weight whole wire