The

**equations**can be utilized for any motion that can be described as being either a**constant**velocity motion (an**acceleration**of 0 m/s/s) or a**constant acceleration**motion. They can never be used over any time period during which the**acceleration**is changing. Each of the kinematic**equations**include four variables.Accordingly, what is constant acceleration on a graph?

The curves on the previous

**graph**were all straight lines. A straight line is a curve with**constant**slope. Since slope is**acceleration**on a velocity-time**graph**, each of the objects represented on this**graph**is moving with a**constant acceleration**. Were the**graphs**curved, the**acceleration**would not have been**constant**.When the velocity is constant is the acceleration 0?

By definition,

**acceleration**means change in**velocity**. So if the**velocity is constant**, this means both speed and direction are**constant**. And there has to be at least one of these things changing for the**velocity**to change, the**acceleration is**zero if none of these things change and the**velocity**is said to be**constant**.What is the motion of an object with constant acceleration?

**Motion with constant acceleration**.

**Motion with constant acceleration**occurs in everyday life whenever an object is dropped: the object moves downward with the

**constant acceleration**, under the influence of gravity. Likewise, is the body's instantaneous velocity at time .