Question

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?

Answer 1

Review the definitions of static and kinetic friction coefficents and the equations will tell you how to proceed.