Newton’s laws (Module 1.03, 1.04)

A quizlet about Newton’s laws

Several excellent websites:

A video on free-fall (gravity).

Of course, everyone likes a cheesy song about Isaac Newton.  Or, another such video.

And for the more serious, here’s a video of Neil DeGrasse Tyson about the person he’d most want to meet if he could go back into time:  Isaac Newton.

For the extremely serious, the Stanford Encyclopedia of Philosophy has an entry on NewtonAnd here’s an essay about the world of classical physics–started by Galileo and then developed by Newton–and the world of quantum physics, represented by Einstein.


Newton Law I:  Inertia (objects tend to resist changes in motion.  An object at rest tends to remain at rest, an object in motion tends to remain in motion w/constant velocity).

Inertia and mass (from Flipping Physics)

Intro to Newton’s first law (from Flipping Physics)


Newton’s Law 2:  Force = mass * acceleration

Intro to Newton’s second law with an example–and another video with a sample problem and demonstration (from Flipping Physics)

A three-force example of Newton’s second law (from Flipping Physics).

(And why don’t things just keep going, accelerating, once you apply a force to them?  Because friction slows them down–friction is a force that acts in the opposite direction as the motion!)


Newton’s Law 3:  Every action has an equal an opposite reaction.  That’s right, when you jump up, even as the Earth is pulling you down, you are pulling the Earth up–you just don’t notice it because you are so infinitesmally small relative to the Earth.

Intro to Newton’s third law of motion (from Flipping Physics.)

Common misconceptions about Newton’s 3rd law (from Flipping Physics).

Newton’s third law oops! example (from Flipping Physics)