# Introduction to Constant Acceleration

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Lesson Transcript
Instructor: Richard Cardenas

Richard Cardenas has taught Physics for 15 years. He has a Ph.D. in Physics with a focus on Biological Physics.

The most useful type of motion in physics is that of constant acceleration. In this lesson you will learn about constant acceleration, why it is important, and an example of motion that undergoes constant acceleration.

## Definition of Constant Acceleration

Whenever the speed of an object changes, that object is said to be accelerating. Acceleration is defined as the rate that your speed changes, or how fast your speed is changing. This means that whenever you slow down or speed up, you are accelerating. Constant acceleration is an even more specific type of accelerated motion. An object that travels with constant acceleration has a speed that changes by the same amount each second. For instance, if the speed was 2 meters/second in the first second, 4 meters/second in the next second, and 6 meters/second in the third second etc., then the speed increases by a constant amount of 2 meters/second during each second. Therefore, the acceleration of the object is 2 meters/second/second (the units are also known as meters per second squared).

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