consider a book at rest on a table. The Earth's gravity pulls down upon the book. The "reaction" to that "action" is not the support force from the table holding up the book, but the gravitational pull of the book acting on the Earth. source under third law
A bouncing ball in forward motion photographed at 25 frames per second using a stroboscopic flash. source
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Ast Sci old header 20 04
Part 2 builder https://www.blogger.com/blog/pages/611149368896510218
club builder https://www.blogger.com/u/1/blog/pages/7040417745889102616
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