Answer the following question given this paragraph: 

Acceleration that does not change in time is called uniform or constant acceleration. The velocity at the beginning of the time interval is called initial velocity, , and the velocity at the end of the time interval is called final velocity, . In a velocity versus time graph for uniform acceleration, the slope of the line is the acceleration. The equation that describes the curve is .


Q: The velocity at the beginning of the time interval is called what?


A:
initial velocity