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Other bicycle warning signs such as the Hill sign may be installed on bicycle facilities to warn bicyclists of conditions not readily apparent. If used, other advance bicycle warning signs should be installed no less than 15 m (50 ft) in advance of the beginning of the condition.

Bicycle Hill, Black and White

Other bicycle warning signs such as the Hill sign may be installed on bicycle facilities to warn bicyclists…

Other bicycle warning signs such as the Hill sign may be installed on bicycle facilities to warn bicyclists of conditions not readily apparent. If used, other advance bicycle warning signs should be installed no less than 15 m (50 ft) in advance of the beginning of the condition.

Bicycle Hill, Color

Other bicycle warning signs such as the Hill sign may be installed on bicycle facilities to warn bicyclists…

Other bicycle warning signs such as the Hill sign may be installed on bicycle facilities to warn bicyclists of conditions not readily apparent. If used, other advance bicycle warning signs should be installed no less than 15 m (50 ft) in advance of the beginning of the condition.

Bicycle Hill, Outline

Other bicycle warning signs such as the Hill sign may be installed on bicycle facilities to warn bicyclists…

Other bicycle warning signs such as the Hill sign may be installed on bicycle facilities to warn bicyclists of conditions not readily apparent. If used, other advance bicycle warning signs should be installed no less than 15 m (50 ft) in advance of the beginning of the condition.

Bicycle Hill, Silhouette

Other bicycle warning signs such as the Hill sign may be installed on bicycle facilities to warn bicyclists…

"If the plane is inclined downwards, the ball is instantly thrown into motion, because the centre of gravity then falls forward of that motion, or the point on which the ball rests." -Comstock 1850

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…

"A quadrant, or one fourth of a circle. The oblique lines indicate various angles with the base. The heavy line indicates the inclination of the earth's axis as compared with the plane of its orbit, which is represented by the base." -Wiswell, 1913

Inclination of Earth's Axis

"A quadrant, or one fourth of a circle. The oblique lines indicate various angles with the base. The…

"Goniometer. An instrument for measuring solid angles, or the inclination of planes, particularly the angles formed by the faces of crystals." -Whitney, 1911

Hand Goniometer

"Goniometer. An instrument for measuring solid angles, or the inclination of planes, particularly the…

"Goniometer. An instrument for measuring solid angles, or the inclination of planes, particularly the angles formed by the faces of crystals." -Whitney, 1911

Reflection Goniometer

"Goniometer. An instrument for measuring solid angles, or the inclination of planes, particularly the…

"That the cannon ball is capable of attracting as well as being attracted, may be proved by suspending two balls close to each other by very long cords. In consequence of their attraction, the cords will not hang parallel, but will incline towards each other as they descend...." —Quackenbos 1859

Gravity Proved by Cannon Balls

"That the cannon ball is capable of attracting as well as being attracted, may be proved by suspending…

"Suppose the inclined plane, to be two feet from A to B, and one foot from C to B, then, as we have already seen, a power of one pound at P, would balance a weight of two pounds at W." -Comstock 1850

Inclined Plane

"Suppose the inclined plane, to be two feet from A to B, and one foot from C to B, then, as we have…

"Suppose two inclined planes, of the same height, with bases of different lenghts; then the weight and power will be to each other as the lenght of the planes." -Comstock 1850

Incline Planes

"Suppose two inclined planes, of the same height, with bases of different lenghts; then the weight and…

"The power required to force a given weight up an inclined plane, is in proportion to its height, and the length of its base, or in other words, the force must be in proportion to the rapidity of its inclination." -Comstock 1850'

Inlined Plane with Weight

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

"A force pushing a weight from C to D, only raises it through the perpendicular height, E D, by acting along the whole length of the plane, C D; and if the plane be twice as it is high, one pound at B, acting over the pulley, D, would balance two pounds at A, or any where on the plane; and so of all other quantities and proportions." — Goodrich, 1844

Inclined Plane

"A force pushing a weight from C to D, only raises it through the perpendicular height, E D, by acting…

An illustration of an inclined railway, also known as a funicular or funicular railway. This railway runs on a pulley system, where two cars are counterbalanced, with one car ascending and one car descending.

Inclined Railway

An illustration of an inclined railway, also known as a funicular or funicular railway. This railway…

An inclined plane used to multiply work done.

Inclined Plane

An inclined plane used to multiply work done.

An illustration of an inclined plane pulley. "Let the weight w be started to move p the plane, and let P be the pull in the cord which just keeps up steadily the motion imparted to w. Then id l is the length of the plane and h its vertical height, it is evident that when w rolls the whole distance l, P falls through the same distance since the length of l of cord passes over the pulley." -Britannica, 1891

Incline Plane Pulley

An illustration of an inclined plane pulley. "Let the weight w be started to move p the plane, and let…

"That the screw is a modified inclined plane, may be shown by winding a triangular piece of paper around a cylinder." — Avery, 1895

Diagram of a screw

"That the screw is a modified inclined plane, may be shown by winding a triangular piece of paper around…

A small wheeled toy at the top of a small wooden incline.

Toy on ramp

A small wheeled toy at the top of a small wooden incline.

"The next simple mechanical power is the wedge. This instrument may be considered as two inclined planes, placed base to base." -Comstock 1850

Wedge

"The next simple mechanical power is the wedge. This instrument may be considered as two inclined planes,…

"[A wedge] is simply a movable inclined plane, or two such planes united a their bases." -Avery 1895

Wedge Splitting Wood

"[A wedge] is simply a movable inclined plane, or two such planes united a their bases." -Avery 1895

"This wedge is a movable inclined plane. Allows for raising great weights a short distance." —Quackenbos 1859

Inclined Plane Wedge

"This wedge is a movable inclined plane. Allows for raising great weights a short distance." —Quackenbos…