# The washer slides on a smooth surface with an acceleration of -2m / s2. What is the coefficient of friction

December 29, 2020 | education

| **The washer slides on a smooth surface with an acceleration of -2m / s2. What is the coefficient of friction between the washer and the surface?**

In this problem, there is absolutely no need to know the puck acceleration. The condition says that the washer slides on a SMOOTH surface, that is, there is no friction at all, therefore, the friction coefficient is zero.