Acceleration ? Symbol: $\vec{a}$ <br>Derived Unit: $\frac{m}{s^2}$ <br>The rate of change in velocity during a time interval. <br>Related: Average, Constant, Centripetal Acceleration-Time graph:: A motion graph. Average Velocity Constant Acceleration Constant Velocity ? The velocity of the object does not change. The symbol is a lowercase v. Related Terms: velocity, average velocity <br>Delta:: means a difference or a change in. Displacement Frame of reference Instantaneous Acceleration Origin:: A chosen location on a coordinate system. Position Position-Time graph Speed Velocity Velocity-Time graph