an apparatus for determining the velocity of a projectile from the amount of deflection produced when it strikes a target that is free to oscillate.
| 单词 | θ75920 |
| 释义 | the world > matter > physics > mechanics > dynamics > [noun] > speed or direction as vector quality > device to measure or record velocity (5) ballistic pendulum1764 an apparatus for determining the velocity of a projectile from the amount of deflection produced when it strikes a target that is free to oscillate. tachometer1810 An instrument by which the velocity of machines is measured; spec. one that indicates the speed of an engine in r.p.m. velocimeter1842 An instrument or apparatus (variously constructed) for measuring the speed or velocity of engines, vessels, projectiles, etc. velocity-measurer1850 gun-pendulum1867 (a) ‘a device employed to determine the initial velocity of projectiles by means of the recoil of the gun’ (Hamersly Naval Encycl. 1881); (b) ‘a… |
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