Question

When you push a 1.85-kg book resting on a

tabletop, you have to exert a force of 2.10 N to
start the book sliding. Once it is sliding, however,
you can use a force of only 1.01 N to keep the
book moving with constant speed.
What is the coefficient of static friction between the book and the laptop?
What is the coefficient of kinetic friction between the book and the tabletop?

Answer 1

Given:

mb=2.05 kgmb=2.05 kg Mass of the book

fs=2.45 Nfs=2.45 N Static friction

fk=1.50 Nfk=1.50 N Kinetic friction