### Atwood's Machine

Atwood's machine illustrates the effects of force in producing motion.

### Battering Ram

"Batering-ram, an engine for battering down the walls of besieged places. The ancients employed two…

### Bayonet Thrust

"The force of the thrust is delivered principally with the right arm, the left being used to direct…

### Buttress of Blocks

Uniting the theories of partial polygons of resistance and centres and lines of resistance, this buttress…

### Capstan

"The capstan, in universal use, on board of ships, is an axle placed upright, with a head, or drum,…

### Cathode

This illustration shows rays attracted to a magnet, and exerting force upon the object against which…

### Centrifugal Force

"When a vessel containing water is whirled rapidly round, why does not the water fall out when the vessel…

### Centrifugal Force

"Suppose a cannon ball, tied with a string to the centre of a slab of smooth marble, and suppose an…

### Centrifugal Force

"Attach a ball, for instance, to a cord; and , fastening the end of the cord at a point, O, give a quick…

### Centrifugal Force

"The instant one of the strings is let go, the centrifugal force carries off the stone in a tangent…

### Centrifugal Force Demonstration

"AB is a wheel with a broad rim, or felly. A wine glass partly filled with water is placed on the inner…

### Connected dynamo and motor

"Where a motor is connected with the electric circuit of a dynamo...and the armature of the dynamo is…

### Electricity

This illustration shows the field between two equally and oppositely charged spheres, mapped out by…

### Electricity

This illustration represents the field between two equal positive charges; in this case the lines of…

### Electricity

This illustration shows the lines of force when a positive charge equal to 4 at A, and a negative charge…

### Electricity

This illustration shows the field of force due to a charge 1 at A, and a like charge 4 at B.

### Electricity

This illustration shows the field of force between two parallel planes. At the edges its lines of foce…

### Electricity

A is a positively charged conductor and B represents the equal and oppsite charge. When the conductor…

### Equipotential Lines

"When a charge is moved from any point to another point in the same equipotential surface, no work is…

### Magnetic Field Around a Current Carrying Wire

"If the conducting wire is bent into the form shown, the lines of force will pas around the wire from…

### Force

An example of the turning tendency of force.

### Inclined Plane with the Force Acting Parallel to the Base

"An inclined plane is a slope, or flat surface, making an angle with a horizontal line...the force acts…

### Inclined Plane with the Force Acting Parallel to the Plane

"An inclined plane is a slope, or flat surface, making an angle with a horizontal line...the force acts…

### Force pump

"The operation of the force-pump is similar to that of the suction-pump. The outlet-valve generally…

### Steam-engine Force Pump

"The force-pump differs from others in having its piston solid, or without a valve, and also in having…

### Centrifugal Force

"If a body be fastened to a string and whirled, so as to give it a circular motion, there will be a…

### Forcing-Pump

"In the forcing-pump atmospheric pressure plays but a small part. There is no valve in the piston c,…

### Hero's Machine

"Hero's Machine. The generation of steam from water by the application of heat, and the mechanical force…

### Hydraulic Bellows

"An instrument called the hydrostatic bellows, also shows, in a striking manner, the great force of…

### Inlined Plane with Weight

"The power required to force a given weight up an inclined plane, is in proportion to its height, and…

### Lines of Force under Induction

"Lines of force of a charged sphere and a conductor under induction. The negative electrification on…

### Lever

"The object W to be lifted is called the weight; the force is represented by P; the point, or pivot,…

### Lever

"The object W to be lifted is called the weight; the force is represented by P; the point, or pivot,…

### Lever

"The object W to be lifted is called the weight; the force is represented by P; the point, or pivot,…

### Lever and Fulcrum

Illustration of a lever with fulcrum F. W represents the weight lifted, P is the force that does the…

### Hammer Used as a Lever

Illustration of a hammer being used as a lever. F represents the fulcrum.

### Steel-yard Used as a Lever

Illustration of an ordinary steel-yard being used as a lever. F represents the fulcrum. Weight P is…

### Lines of Force

"Lines of force of a circular loop. If a current flow through the loop in the direction indicated, the…

### Lines of Force

"Lines of force in a circular loop. If the loop pass through a piece of cardboard at right angles to…

### Tracing magnetic field lines

"Tracing lines of force with a suspended magnet." -Hawkins, 1917

### Magnetic Field

"Experiment showing lines of force in the magnetic field surrounding a conductor carrying an electric…

### Magnetism

"Experiment illustrating the molecular theory of magnetism. Coarse steel filings are placed inside a…

### Maxwell's Corkscrew Rule

"Illustrating Maxwell's 'corkscrew rule' for relative directions of current and lines of force...a current…

### Motions Of 2 Points In Same Plane And Parallel

Illustration showing two points a and b to be in the same plane and parallel.

### Motions Of 2 Points In Same Plane And Parallel

Illustration showing two points a and b to be in the same plane and parallel.

### Motions Of 3 Points

Illustration showing three points a, b, and c in motion. The magnitude and direction of a and b are…

### Parallelopiped of Motions

Illustration used "If three component motions ab, ac, and ad are combined, their resultant af will be…

### Parallelogram

"In the diagram, let AB and AC represent two forces acting upon the point, A. Draw the two dotted lines…

### Motion of a Pendulum

"When the pendulum is drawn from its vertical position, the force of gravity, MG, is resolved into two…

### Attractive poles

A pair of opposite poles attracting, the magnetic force shown by iron filings.

### Hydraulic Machine Exerting Pressure

Illustration of a hydraulic machine. "A principle known as Pascal's Law states that pressure exerted…

### Experimental Verification of Principle of Archimedes

An experimental verification of the Principle of Archimedes.

### Double-acting Force Pump

"A double-acting pump of the piston pattern is shown [here]. Such a pump has two sets of suction valves…

### Force Pump

An illustration of a force pump which is used to force liquid up and expel it under pressure.

### Forcing Pump

"As the piston ascends, as shown in the left-hand figure, the pressure of the atmosphere forces the…

### Hand Operated Pump

One sort of pump once common worldwide was a hand-powered water pump over a water well where people…

### Plunger Pump

"The action does not differ in any way from that of the piston force pump. During the up stroke of the…

### Steam Pump

"Steam pumps are force pumps operated by steam acting on the piston of a steam engine directly connected…

### Resultant Motion with Boat

"Let, for instance, the force used by the boatman be twice as great as that of the tide. Then by the…