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a simple machine that gives a mechanical advantage when given a fulcrum

a simple machine that gives a mechanical advantage when given a fulcrum

More agreeable; more pleasing.

Rather.

A rigid piece which is capable of turning about one point, or axis (the fulcrum), and in which are two or more other points where forces are applied; -- used for transmitting and modifying force and motion. Specif., a bar of metal, wood, or other rigid substance, used to exert a pressure, or sustain a weight, at one point of its length, by receiving a force or power at a second, and turning at a third on a fixed point called a fulcrum. It is usually named as the first of the six mechanical powers, and is of three kinds, according as either the fulcrum F, the weight W, or the power P, respectively, is situated between the other two, as in the figures.

A bar, as a capstan bar, applied to a rotatory piece to turn it.

An arm on a rock shaft, to give motion to the shaft or to obtain motion from it.

More agreeable; more pleasing.

Rather.

A rigid piece which is capable of turning about one point, or axis (the fulcrum), and in which are two or more other points where forces are applied; -- used for transmitting and modifying force and motion. Specif., a bar of metal, wood, or other rigid substance, used to exert a pressure, or sustain a weight, at one point of its length, by receiving a force or power at a second, and turning at a third on a fixed point called a fulcrum. It is usually named as the first of the six mechanical powers, and is of three kinds, according as either the fulcrum F, the weight W, or the power P, respectively, is situated between the other two, as in the figures.

A bar, as a capstan bar, applied to a rotatory piece to turn it.

An arm on a rock shaft, to give motion to the shaft or to obtain motion from it.

A bar of metal, etc., turning on a support (fulcrum) and raising a weight.

A bar of metal or other substance turning on a support called the fulcrum or prop, for raising weights.

Bar turning on a fulcrum, for applying power.

An inflexible rod, turning round a fixed point, and used for moving bodies, bearing burdens, or raising them. The point on which the lever moves is called the Fulcrum, Hypomochlion. The force which moves the lever is called the power; and the weight to be moved, the resistance. There are three kinds of levers. A lever of the first kind has the fulcrum between the power and resistance. A lever of the second kind has the resintance between the fulcrum and power; whilst a lever of the third kind has the power between the fulcrum and resistance. In the locomotive system of the human body, we have examples of all the three kinds. The bones represent levers; the muscles of locomotion are powers; the weight of parts to be moved constitutes the resistance. The fulcra, are, at times, the joints; at others, the ground, etc. The head moves of the neck, as a lever of the first kind; the first cervical vertebra forming the fulcrum. We rise on tiptoe by a lever of the second kind, the fulcrum being the ground under the toes; and we have examples of a lever of the third kind in the flexion of the fore-arm on the arm, in the elevation of the arm, etc.

(F.) Levier, is an instrument curved at the extremity, and having a fenestra. It is used to assist the extraction of the child's head, when instrumental aid is necessary. Levers are, also, used by the dentist for extracting stumps, etc. The Levier de l’ecluse, Langue de Carpe, Trivelin or Punch, is employed for extracting the molar teeth.

n. [French] A bar of metal, wood, or other substance, used to exert a pressure or sustain a weight at one point of its length by receiving a force or power at a second, and turning at a third on a fixed point called a fulcrum.