This model is applicable to a single point particle moving with constant velocity. It is a subclass of the One-Dimensional Motion with Constant Acceleration model defined by the constraint a = 0.

For pure kinematics problems, the problem will often explicitly state that the velocity is constant, or else some quantitative information will be given (e.g. a linear position versus time plot) that implies the velocity is constant.

None.

• [position (one-dimensional)]
• velocity

A single point particle (or a system treated as a point particle with position specified by the center of mass).

In order for the velocity to be constant, the system must be subject to no net interaction.