17 relations: Cycle per second, English units, Friction, Gaspard de Prony, Horsepower, International System of Units, Metre, Newton (unit), Newton metre, Pi, Pound (force), Pound-foot (torque), Power (physics), Rotational speed, Spring scale, Tachometer, Torque.

## Cycle per second

The cycle per second was a once-common English name for the unit of frequency now known as the hertz.

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## English units

English units are the historical units of measurement used in England up to 1826 (when they were replaced by Imperial units), which evolved as a combination of the Anglo-Saxon and Roman systems of units.

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## Friction

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.

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## Gaspard de Prony

Baron Gaspard Clair François Marie Riche de Prony (22 July 1755 – 29 July 1839) was a French mathematician and engineer, who worked on hydraulics.

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## Horsepower

Horsepower (hp) is a unit of measurement of power (the rate at which work is done).

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## International System of Units

The International System of Units (SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system, and is the most widely used system of measurement.

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## Metre

The metre (British spelling and BIPM spelling) or meter (American spelling) (from the French unit mètre, from the Greek noun μέτρον, "measure") is the base unit of length in some metric systems, including the International System of Units (SI).

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## Newton (unit)

The newton (symbol: N) is the International System of Units (SI) derived unit of force.

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## Newton metre

The newton metre (also newton-metre, symbol N m or N⋅m) is a unit of torque (also called "moment") in the SI system.

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## Pi

The number is a mathematical constant.

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## Pound (force)

The pound-force (symbol: lbf, sometimes lbf) is a unit of force used in some systems of measurement including English Engineering units and the British Gravitational System.

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## Pound-foot (torque)

A pound-foot (lbf⋅ft or lb⋅ft) is a unit of torque (a pseudovector).

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## Power (physics)

In physics, power is the rate of doing work, the amount of energy transferred per unit time.

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## Rotational speed

Rotational speed (or speed of revolution) of an object rotating around an axis is the number of turns of the object divided by time, specified as revolutions per minute (rpm), cycles per second (cps), radians per second (rad/s), etc..

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## Spring scale

A spring scale or spring balance or newton meter is a type of weighing scale.

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## Tachometer

A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine.

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## Torque

Torque, moment, or moment of force is rotational force.

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## Redirects here:

De Prony brake, De prony brake.