# Ballistic pendulum

Ballistic pendulum
Pendulum Pen"du*lum, n.; pl. {Pendulums}. [NL., fr. L. pendulus hanging, swinging. See {Pendulous}.] A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the movements of clockwork and other machinery. [1913 Webster]

Note: The time of oscillation of a pendulum is independent of the arc of vibration, provided this arc be small. [1913 Webster]

{Ballistic pendulum}. See under {Ballistic}.

{Compensation pendulum}, a clock pendulum in which the effect of changes of temperature of the length of the rod is so counteracted, usually by the opposite expansion of differene metals, that the distance of the center of oscillation from the center of suspension remains invariable; as, the mercurial compensation pendulum, in which the expansion of the rod is compensated by the opposite expansion of mercury in a jar constituting the bob; the gridiron pendulum, in which compensation is effected by the opposite expansion of sets of rodsof different metals.

{Compound pendulum}, an ordinary pendulum; -- so called, as being made up of different parts, and contrasted with {simple pendulum}.

{Conical pendulum} or {Revolving pendulum}, a weight connected by a rod with a fixed point; and revolving in a horizontal cyrcle about the vertical from that point.

{Pendulum bob}, the weight at the lower end of a pendulum.

{Pendulum level}, a plumb level. See under {Level}.

{Pendulum wheel}, the balance of a watch.

{Simple pendulum} or {Theoretical pendulum}, an imaginary pendulum having no dimensions except length, and no weight except at the center of oscillation; in other words, a material point suspended by an ideal line. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

### Look at other dictionaries:

• Ballistic pendulum — Ballistic Bal*lis tic, a. 1. Of or pertaining to the ballista, or to the art of hurling stones or missile weapons by means of an engine. [1913 Webster] 2. Pertaining to ballistics[2], or to a projectile in a gravitational field. [1913 Webster… …   The Collaborative International Dictionary of English

• Ballistic pendulum — A ballistic pendulum is a device for measuring a bullet s momentum, from which it is possible to calculate the velocity and kinetic energy. Ballistic pendulums have been largely rendered obsolete by modern chronographs, which allow direct… …   Wikipedia

• ballistic pendulum — noun a physical pendulum consisting of a large mass suspended from a rod; when it is struck by a projectile its displacement is used to measure the projectile s velocity • Hypernyms: ↑physical pendulum, ↑compound pendulum • Hyponyms: ↑gun… …   Useful english dictionary

• ballistic pendulum — Physics. a device consisting of a large mass hung from a horizontal bar by two rods, used to measure the velocity of an object, as a bullet, by retaining the object upon impact, its velocity being a function of the displacement of the mass. [1770 …   Universalium

• ballistic pendulum — balistinė švytuoklė statusas T sritis fizika atitikmenys: angl. ballistic pendulum vok. ballistisches Pendel, n rus. баллистический маятник, m pranc. pendule balistique, m …   Fizikos terminų žodynas

• ballistic pendulum — /bəˌlɪstɪk ˈpɛndʒələm/ (say buh.listik penjuhluhm) noun a heavy block of wood suspended on strings so that it can swing in one plane only, used for measuring the momentum of bullets, etc …

• Pendulum — Pen du*lum, n.; pl. {Pendulums}. [NL., fr. L. pendulus hanging, swinging. See {Pendulous}.] A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the movements …   The Collaborative International Dictionary of English

• Pendulum bob — Pendulum Pen du*lum, n.; pl. {Pendulums}. [NL., fr. L. pendulus hanging, swinging. See {Pendulous}.] A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the… …   The Collaborative International Dictionary of English

• Pendulum level — Pendulum Pen du*lum, n.; pl. {Pendulums}. [NL., fr. L. pendulus hanging, swinging. See {Pendulous}.] A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the… …   The Collaborative International Dictionary of English

• Pendulum wheel — Pendulum Pen du*lum, n.; pl. {Pendulums}. [NL., fr. L. pendulus hanging, swinging. See {Pendulous}.] A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the… …   The Collaborative International Dictionary of English