### Atwood's Machine

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

Biceps muscle attached to the radius.

### Center of Gravity of a Ball Rolling on an Incline

"If the plane is inclined downwards, the ball is instantly thrown into motion, because the centre of…

### Periodic Center of Motion

Illustration showing the periodic center of motion as it often happens when two positions of a line…

### Centrifugal Force

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

### Centroid

Illustration showing a centroid, "the curve passing through the successive positions of the instantaneous…

### Compound Motion

"Compound motion is that which is produced by two or more forces, acting in different directions, on…

### Curve, Heart Cam

"This is the curve of the heart cam for converting uniform rotary motion into uniform reciprocal motion."…

### Motion of Open Curves

"Since these curves are not closed, one pair cannot be used for continuous motion; but a pair of such…

### Fly Drill

"A drill to which a steady momentum is imparted by means of a fly-wheel having a reciprocating motion…

### Circular Motion of the [Electric] Fluid

"Thus, if we suppose the conducting wire be placed in a vertical situation, as shown, and p, n, the…

### Rolling of Equal Ellipses

"If two equal ellipses, each turning about one of its foci, are placed in contact in such a way that…

### Rolling of Equal Hyperbolas

Illustration of the rolling of equal hyperbolas. If two equal hyperbolas are placed so that the distances…

### Rolling of Equal Parabolas

Illustration of the rolling of equal parabolas. "The two parabolas may be considered as two ellipses…

A piece in clocks and watches that converts rotational motion into oscillation, as in a pendulum.

### Recoiling Escapement

A piece in clocks and watches that converts rotational motion into oscillation, as in a pendulum.

### Friction Cones

"Friction-cones. a and b, cones; c, fork. In machinery, a form of friction-coupling consisting of two…

### Governor

"Of all the contrivances for regulating the motion of machinery, this is said to be the most effectual.…

### Construction of Logarithmic Spiral

Illustration showing how a rolling logarithmic spiral can be constructed by taking successive values…

### Rolling of Logarithmic Spirals

Illustration showing the rolling of two logarithmic spirals of equal obliquity.

### Mitre-wheels

"2 wheels revolving in contact, but in different planes, so as to transfer motion from one plane to…

### Components of Momentum

The aggregate of the components of momentum.

### Projectile Motion

"Device used to prove that all things fall at the same rate due to gravity. When the device is triggered,…

### Rolling of Non-cylindrical Surfaces

Illustration showing that the rolling of non-cylindrical surfaces. "If the angular velocity ratio of…

### Parallel Motion

"Its mechanism may be understood by the means of the subjoined figure, B represents the end of the beam,…

### Motion of a Pendulum

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

### Planet Rotations

"The motion of Saturn, Jupiter, and Mars with respect to Earth." — Encyclopedia Britanica, 1893

### Projectile Motion of a Cannonball

"Suppose a cannon be loaded with a ball, and placed on top of a tower, at such a height from the ground,…

### Projectile Motion of a Stone

"[This illustration] shows the path of a stone thrown obliquely from the hand. The propelling force…

### Projectile Motion of a Cannon Ball

"Thus, we have a cannon planted on a towwer at such a height that it would take four seconds for a ball…

### Reflected Motion

"Suppose a, b, to be a marble floor, and c, to be an ivory ball, which has be thrown towards the floor…

### Reflected Motion

"If the ball approaches the floor under a larger or smaller angle, its rebound will observe the same…

### Reflected Motion

"... if a ball be thrown from F against the surface B C so as to strike it perpendicularly at A, it…

### Resultant Motion with Ball

"The ball C is placed on a square frame between two upright wires, on each of which a ball slides so…

### Resultant Motion with Boat

"We have an example of resultant motion in a boat which a person attempts to row north across a river,…

### 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…

### Right Hand Rule of Induced Current

"Fleming's rule for direction of induced current. Extend the thumb, forefinger and middle finger of…

### Section of Rolling Surfaces

Illustration showing a section of the rolling surfaces by a plane perpendicular to their straight line…

### Shafting

"In machinery, the system of shafts which connects machinery with the prime mover, and through which…

### Logarithmic Spiral Sector

In this illustration, "the driven surface of the slide coincides with the tangent to the spiral, the…

### Motion of Translation

Illustration showing the motion of translation of two parallel motions.

### Water-Belt

Water-belt for transmitting motion, from 1875.