## Elements of Natural Philosophy, Part 1 |

### From inside the book

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

This is the case of a body falling vertically in vacuo under the

this case the space described in any interval is that which would be described in

the same time by a point moving uniformly with a velocity equal to that at the ...

This is the case of a body falling vertically in vacuo under the

**action**of gravity . Inthis case the space described in any interval is that which would be described in

the same time by a point moving uniformly with a velocity equal to that at the ...

Page 35

... a point , produces a change in the direction of motion , but does not influence

the velocity ; so , if a body be rotating about an axis , and be subjected to an

KINEMATICS .

... a point , produces a change in the direction of motion , but does not influence

the velocity ; so , if a body be rotating about an axis , and be subjected to an

**action**tending to produce rotation about a perpendicular axis , the D 2KINEMATICS .

Page 49

As there can be neither annihilation nor generation of matter in any natural

motion or

be equal to the quantity originally in that space , increased by the whole quantity

that ...

As there can 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 mustbe equal to the quantity originally in that space , increased by the whole quantity

that ...

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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