## Elements of Natural Philosophy, Part 1 |

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Page 64

... of kinetic energy produced , and the work done may be wholly stored up as

potential energy . Thus a

requires work to bend it , air requires work to compress it , etc .; but a raised

... of kinetic energy produced , and the work done may be wholly stored up as

potential energy . Thus a

**weight**requires work to raise it to a height , a springrequires work to bend it , air requires work to compress it , etc .; but a raised

**weight**... Page 68

This , when the resistance of the air is removed , is the case of falling bodies ; and

from it we conclude that the

with which the earth attracts it , is proportional to its mass ; a most important ...

This , when the resistance of the air is removed , is the case of falling bodies ; and

from it we conclude that the

**weight**of a body in any given locality , or the forcewith which the earth attracts it , is proportional to its mass ; a most important ...

Page 69

... arise from friction , cohesion ,

in all combinations of machines , will be equal and opposite . Farther on we shall

give a full development of the consequences of this most important remark . 230.

... arise from friction , cohesion ,

**weight**, or acceleration ; -- action and reaction ,in all combinations of machines , will be equal and opposite . Farther on we shall

give a full development of the consequences of this most important remark . 230.

Page 73

The subject for measurement here is precisely the same as that for which Watt , a

hundred years later , introduced the practical unit of a ' Horsepower , ' or the rate

at which an agent works when overcoming 33,000 times the

The subject for measurement here is precisely the same as that for which Watt , a

hundred years later , introduced the practical unit of a ' Horsepower , ' or the rate

at which an agent works when overcoming 33,000 times the

**weight**of a pound ... Page 79

A

sphere resting on a horizontal plane with the loaded side lowest , an oblate body

resting with one end of its shortest diameter on a horizontal plane , a plank ,

whose ...

A

**weight**suspended by a string , a uniform sphere in a hollow bowl , a loadedsphere resting on a horizontal plane with the loaded side lowest , an oblate body

resting with one end of its shortest diameter on a horizontal plane , a plank ,

whose ...

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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