Posted by **Anonymous** on Sunday, January 23, 2011 at 1:38pm.

When you push a 1.55 kg block resting on a tabletop it takes 1.85 N to start the book sliding. Once it is sliding, however, it takes only 1.5 N to keep the book moving with constant speed. what are the coefficients of static and kinetic friction between the book and the tabletop?

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