Newton's First Law of Motion

     Newton's first law of motion tells us about inertia.  An object at rest tends to stay at rest.  An object in motion tends to stay in motion.  The existing condition remains until a force acts upon the object.  The two sites below are a great place to learn about this.

      Introduction
     Video Lesson

The following sites also explain inertia:

     Study Jams video and quiz
     A Little Extra Reading
     Cyberphysics
     Newton's First at the NFL
     Virtual Experiment

Newton's Second Law of Motion

Newton's second law of motion explains how the force needed to move an object is related to its mass and the acceleration created.  



Sailors push their car in an unusual race in San Diego.


How much effort does it take to push a car? 

It depends on how heavy the car is, right?



Other sailors almost run with their car.


In this race, the teams push their cars to the finish line!
Pushing your car faster would require more effort, wouldn't it?

This is what Newton's Second Law is all about.


You can learn more at the links below.

     Introduction to F=MA

     Video Lesson

     Study Jams Video and Quiz

     The Second Law at Cyberphysics

     Newton's Laws in the NFL

     Virtual Lab

     Second Experiment

Newton's Third Law of Motion

Newtons cradle
Newton's Cradle
Animation courtesy of Dominique Toussaint

 "Every action has an equal and opposite reaction."


     This is Newton's Third Law of Motion.

     What does it mean?  How is it possible?  

      Find your answers at the sites below!