ClipArt ETC
A machine that generates electrical charge using friction.

Atkinson Topler-Holtz Machine

A machine that generates electrical charge using friction.

a ball bearing is a type of rolling-element bearing which uses balls to maintain the separation between the moving parts of the bearing.

Ball Bearing

a ball bearing is a type of rolling-element bearing which uses balls to maintain the separation between…

A brake is a device that decelerates a moving object such as car, converting its kinetic energy into heat. Most brakes use friction. This car brake

Friction Shoe Car Brake

A brake is a device that decelerates a moving object such as car, converting its kinetic energy into…

Stage one of fire making uses two hands to turn a wooden sticks which causes friction on a wooden block and results in fire.

Fire-Making

Stage one of fire making uses two hands to turn a wooden sticks which causes friction on a wooden block…

Stage two of fire making consists of a man holding the wooden stick in his mouth and turning the stick rapidly with rope. By spinning the rope rapidly friction is a result causing fire to be created.

Fire-Making

Stage two of fire making consists of a man holding the wooden stick in his mouth and turning the stick…

Stage three of fire making uses a bow as a tension rod and a fly wheel. To begin the bow would wind around the stick; the person would then push down causing the stick the spin. When the tension was released from the bow the fly wheel would continue spinning causing the rope to be re-spun around the stick. This would cause friction below resulting in fire.

Fire-Making

Stage three of fire making uses a bow as a tension rod and a fly wheel. To begin the bow would wind…

"Machines of this kind may be constructed with as many pairs of plaes, combs, and brushes as can be conveniently combined together; four-plate machines being common, in which the relative positions of each pair of plates are reversed, as shown..." -Atkinson 1903

Four-Plate Machine

"Machines of this kind may be constructed with as many pairs of plaes, combs, and brushes as can be…

A grinding machine is a machine tool used for grinding, which is a type of machining using an abrasive wheel as the cutting tool.

Machine for Grinding

A grinding machine is a machine tool used for grinding, which is a type of machining using an abrasive…

"The Atwood machine consists of a wheel or pulley, R, over the grooved edge of which are balanced two equal weights suspended by a long silk thread which is both light and strong. The axle of this wheel is preferably supported upon the circumfrences of four friction wheels, r, r, r', r', for greater delicacy of motion. As the thread is so light that its weight may be disregarded, it is evident that the weights will be in equilibrium whatever their position." — Avery, 1895

Atwood Machine

"The Atwood machine consists of a wheel or pulley, R, over the grooved edge of which are balanced two…

Friction is the tendency of a body to resist movement when it is being moved on a surface. The coefficient of friction is the ratio between the resistance of the motion and the perpendicular pressure between the surfaces as shown. P/W

Elementary Mechanics

Friction is the tendency of a body to resist movement when it is being moved on a surface. The coefficient…

A lubricant is a substance introduced between two moving surfaces to reduce the friction between them, improving efficiency and reducing wear. They may also have the function of dissolving or transporting foreign particles and of distributing heat.

Oil Can

A lubricant is a substance introduced between two moving surfaces to reduce the friction between them,…

"The large wheel a, is supposed to stand over the well, and b, a smaller wheel, is fixed in the water. The rope is extended between the two wheels, and rises on one side in a perpendicular disrection. On turning the wheel by the crank d, the water is brought up by the friction of the rope." -Comstock 1850

Rope Machine

"The large wheel a, is supposed to stand over the well, and b, a smaller wheel, is fixed in the water.…

An illustration showing how to construct Shield's anti-friction curve. "R represents the radius of the shaft, and C1, 2, 3, et., is the center line of the shaft. From o, set off the small distance oa; and set off a1 - R. Set off the same small distance from a to b, and make b2 = R. Continue in the same way with the other points, and the anti-friction curve is thus constructed.

Construction Of Shield's Anti-friction Curve

An illustration showing how to construct Shield's anti-friction curve. "R represents the radius of the…

"Tyndall's experiment illustrating the production of heat by friction. The wheel is rotated and heat is produced [by friction] that heats the water in the end of the brass tube, which causes the water to boil, producing steam which pops off the cork." -Hawkins, 1917

Tyndall's Experiment

"Tyndall's experiment illustrating the production of heat by friction. The wheel is rotated and heat…

A whirling-table, with a brass tube attached. A cork is shooting out of the tube.

Whirling table

A whirling-table, with a brass tube attached. A cork is shooting out of the tube.