## Elements of Natural Philosophy, Part 1 |

### From inside the book

Results 6-10 of 44

Page 62

A Couple is a pair of equal forces

The Moment of a couple is the sum of the moments of its forces about any point in

their plane , and is therefore equal to the product of either force into the shortest ...

A Couple is a pair of equal forces

**acting**in dissimilar directions in parallel lines .The Moment of a couple is the sum of the moments of its forces about any point in

their plane , and is therefore equal to the product of either force into the shortest ...

Page 63

Generally , unit of work is done by unit force

coals from a pit , the amount of work done is proportional to the weight of the

coals lifted ; that is , to the force overcome in raising them ; and also to the height

...

Generally , unit of work is done by unit force

**acting**through unit space . In liftingcoals from a pit , the amount of work done is proportional to the weight of the

coals lifted ; that is , to the force overcome in raising them ; and also to the height

...

Page 67

The case of the equilibrium of a number of forces

deducible at once from this ; for if we introduce one other force equal and

opposite to their resultant , this will produce a change of motion equal and

opposite to ...

The case of the equilibrium of a number of forces

**acting**at one point , is evidentlydeducible at once from this ; for if we introduce one other force equal and

opposite to their resultant , this will produce a change of motion equal and

opposite to ...

Page 70

principle of superposition of forces in equilibrium , all the forces

of the system form , with the reactions against acceleration , an equilibrating set

of forces on the whole system . This is the celebrated principle first explicitly

stated ...

principle of superposition of forces in equilibrium , all the forces

**acting**on pointsof the system form , with the reactions against acceleration , an equilibrating set

of forces on the whole system . This is the celebrated principle first explicitly

stated ...

Page 71

... continues moving uniformly in a straight line , unless in so far as the direction

or velocity of its motion is changed by forces

some other matter not belonging to them ; also that the centre of inertia of any

body ...

... continues moving uniformly in a straight line , unless in so far as the direction

or velocity of its motion is changed by forces

**acting**mutually between them andsome other matter not belonging to them ; also that the centre of inertia of any

body ...

### What people are saying - Write a review

We haven't found any reviews in the usual places.

### Other editions - View all

### 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