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h1. MIT 8.01 Lesson 3:  Motion with Constant Velocity and Zero Net Force


h4. Lesson Summary

\\ {excerpt:hidden=true}We introduce a simple [model] based on Newton's revolutionary insight - that the natural state of motion of an isolated body is motion with constant velocity.{excerpt}We now explore our first [model] \- motion with constant velocity.  According to Newton, this is the natural state of motion.  If that occurs when the net [external|external force] [force] acting on a body is zero, the body.  This constant velocity will movebe with constant [velocity] (measured with respect to anany inertial coordinate system (but not an accelerating one).
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h4. Learning Objectives

After completing this Lesson, students should be able to:

* Describe the difference between [distance] and [displacement].
* Define average [velocity] and average [speed].
* Describe the features of a [motion diagram] that exhibits motion with constant [velocity].
* Relate [displacement], time and [velocity].
* Find [velocity] from the slope of a [position versus time graph].
* Describe the properties of the [position versus time graph] given the [velocity] and the initial [position] for a trip made at constant velocity.
* Mathematically determine when two objects moving with constant velocity will meet by constructing and solving a system of equations.
* Graphically determine when two objects moving with constant velocity will meet.
* understand and use the [One-Dimensional Motion with Constant Velocity|1-D Motion (Constant Velocity)] model template from the [Model Hierarchy].  

{include:Motion with Constant Velocity (Systems)}
{include:Motion with Constant Velocity (Interactions)}
{include:Motion with Constant Velocity (Laws of Change)}
{include:Motion with Constant Velocity (Coordinates)}
{include:Motion with Constant Velocity (Graphs)}
{include:Motion with Constant Velocity (Multi-Stage)}
{include:Motion with Constant Velocity (Multi-System)}

{note}Now that you have completed the Lesson, look at the [model template for 1-D Motion with Constant Velocity|1-D Motion (Constant Velocity)], which is intended to be a succinct summary of what you have learned.
{note}

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