Initial velocity

the velocity of a moving body at starting; especially, the velocity of a projectile as it leaves the mouth of a firearm from which it is discharged.

initial velocity

[i′nish·əl və′läs·əd·ē] (physics) The velocity of anything at the beginning of a specific phase of its motion.

initial velocity

in·i·tial ve·loc·i·ty

the rate of a reaction, for example, an enzyme-catalyzed reaction, at the early stages of the reaction such that the product(s) concentrations have not risen to a level to significantly affect the observable rate; typically, initial velocities are observed when less than 10% of the reaction's approach toward equilibrium has occurred. Synonym(s): initial rate

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