## What is Constant-acceleration motion?

Toward bright spark; If the acceleration vector changes, i.e. either the magnitude or direction of this vector changes, the motion is called constant-acceleration. If the instantaneous and average accelerations are the same, the motion is named constant-acceleration:

If the acceleration remains unchanged, the rate of velocity change will be constant. For instance, assume that a body is moving in the positive direction with a constant acceleration of +4m/s^{2} meaning that 4 m/s is added to the velocity each second. However, if the acceleration is -3m/s^{2}, 3 m/s will be subtracted from the velocity each second.

**In a constant acceleration motion, the velocity changes are the same for identical time intervals.**

### Velocity-time equation

In a constant-acceleration motion, the average and instantaneous acceleration are the same. For this case, the velocity-time equation is written as below:

**In a constant-acceleration motion, the velocity is a linear function of time. For this case, the average velocity between the time interval from t _{1} to t_{2} is equal to the arithmetic mean of the velocities at these two instants:**

**In a constant-acceleration motion, the average velocity equation can be determined as below:**

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