# If a #5 kg# object moving at #2 m/s# slows to a halt after moving #50 m#, what is the coefficient of kinetic friction of the surface that the object was moving over?

##### 1 Answer

Dec 14, 2015

#### Answer:

#### Explanation:

If frictional force is the only retarding force then it is the resultant force and so by Newton's 2nd Law of Motion (assuming motion along a flat surface in 1 direction)

We compute the acceleration

Substituting back for