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Website
PBS

Pbs: Nova: Top Gun Over Moscow

For Students 9th - 10th
An online exhibit investigating the sensations experienced by a cockpit pilot in a Russian aircraft. Focuses on G-forces and apparent weightlessness.
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Unit Plan
Sophia Learning

Sophia: Placement of the Center of Mass

For Students 9th - 10th
This lesson explains why the center of mass might not lie within an object.
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Website
Physics Classroom

The Physics Classroom: Centripetal Force Requirement

For Students 9th - 10th
Animation depicting the effect of a centripetal force on the motion of an object. Newton's laws are used to explain why circular motion requires an inward-directed force.
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Interactive
Concord Consortium

The Concord Consortium: Molecular Workbench: Centrifugal Reaction Force

For Students 9th - 10th
Adjust variables to see how a ball is affected by gravity while traveling around a circle.
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Handout
Walter Fendt

Walter Fendt: Model of a Carousel: Centripetal Force

For Students 9th - 10th
This resource features an applet that models the motion of a carousel ride at an amusement park to demonstrate centripetal force. The motion parameters can be modified and seen in the animation.