Khan Academy
Khan Academy: Inclined Planes Review
Review the key concepts and skills for inclined planes, including how to write Newton's second law for forces parallel and perpendicular to the incline.
A&E Television
History.com: On 9/11, Some Evacuated the Pentagon but Kept Going Back Inside
'We pledge to never leave a fallen comrade behind,' says one of the survivors. American Airlines Flight 77, struck the Pentagon between Wedges 1 and 2. Anderson was in Wedge 2. Pentagon workers who had evacuated were trying to get inside...
Khan Academy
Khan Academy: Simple Machines and How to Use This Tutorial
There are six simple machines. They are as follows: lever, wheel, pulley, incline plane, wedge, and screw. This tutorial will cover the first three.
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