## Elements of Natural Philosophy |

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Page 1

Force is recognized as acting in two ways : 1 ° so as to compel

change of motion , and 2 ° so as to produce or to change motion . Dynamics ,

therefore , is divided into two parts , which are conveniently called STATICS and

...

Force is recognized as acting in two ways : 1 ° so as to compel

**rest**or to preventchange of motion , and 2 ° so as to produce or to change motion . Dynamics ,

therefore , is divided into two parts , which are conveniently called STATICS and

...

Page 8

Hence if a point have , at the same time , velocities represented by OA , AC , and

Co , the sides of a triangle taken in the same order , it is at

resultant of velocities represented by the sides of any closed polygon whatever ...

Hence if a point have , at the same time , velocities represented by OA , AC , and

Co , the sides of a triangle taken in the same order , it is at

**rest**. Hence theresultant of velocities represented by the sides of any closed polygon whatever ...

Page 18

... imagine , impressed upon each in composition : with its own motion , a motion

equal and opposite to the motion of that one , which will thus be reduced to

while the motions of the others will remain the same with regard to it as before .

... imagine , impressed upon each in composition : with its own motion , a motion

equal and opposite to the motion of that one , which will thus be reduced to

**rest**,while the motions of the others will remain the same with regard to it as before .

Page 33

Hence , as is momentarily.at

one of internal rolling on a circle of double its diameter . Hence if a circle roll

internally on another of twice its diameter any point in as 02 0 its circumference ...

Hence , as is momentarily.at

**rest**, the motion of the circle circumscribing OBQA isone of internal rolling on a circle of double its diameter . Hence if a circle roll

internally on another of twice its diameter any point in as 02 0 its circumference ...

Page 36

IB = w la Hence the line 01 is instantaneously at

OA and OB may be compounded into one about Ol . Draw a B 19 , 19 , parallel to

OB , OA respectively 36 PRELIMINARY .

IB = w la Hence the line 01 is instantaneously at

**rest**, or the two rotations aboutOA and OB may be compounded into one about Ol . Draw a B 19 , 19 , parallel to

OB , OA respectively 36 PRELIMINARY .

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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 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