Instantaneous Velocity The instantaneous velocity v is defined as the limit of the average velocity as the time interval At becomes infinitesimally short ≡lim △t→>0 △△ Physics 121: Lecture 4, Pg 5Physics 121: Lecture 4, Pg 5 Instantaneous Velocity The instantaneous velocity v is defined as the limit of the average velocity as the time interval t becomes infinitesimally short t x v t     →0 lim