Online College Courses for Credit



Author: Nathan Lampson

This lesson will introduce the concept of acceleration, explaining the difference between acceleration and deceleration.

See More
Fast, Free College Credit

Developing Effective Teams

Let's Ride
*No strings attached. This college course is 100% free and is worth 1 semester credit.

37 Sophia partners guarantee credit transfer.

299 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 32 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.


Acceleration is an increase in  velocity over time.  Velocity is a measure of both, the speed of an object and its direction. Even if an object is traveling at a constant speed it can be accelerating if it is changing direction. Accelerating objects can be represented with distance-versus-time graphs.  The slope of the graph is increasing because as time progresses the object is moving faster than the second before.


When a car accelerates from a stop light it increases its speed and the distance it is traveling each second.


Deceleration is when objects slow down.



A car decelerates when it slows to a stop at a red traffic light.