4F Motion #1 The change in motion of an object is proportional to the applied force and inversely proportional to the mass.... 4F Motion #4 Whenever one thing exerts a force on another, an equal amount of force is exerted back on it....

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Newton's Laws: Elephant and Feather - Free Fall

http://www.physicsclassroom.com/mmedia/newtlaws/efff.html


Description

This is a demonstration and explanation of free fall. It demonstrates that in the absence of air resistance, an elephant and feather strike the ground at the same time. It includes some true/false statements with which students can test their understanding, as well as links to further resources, including relevant sections from other Physics Classroom tutorials. It also has a link to a demonstration of the same scenario, but with air resistance. (See Newton’s Laws: Elephant and Feather - Air Resistance.)

This is a good resource to use to help identify and address student misconceptions related to force, weight, gravity, mass, and acceleration. Use this with the accompanying demonstration about falling with air resistance (Newton’s Laws: Elephant and Feather - Air Resistance).

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Created :08/26/2002