# If a #4 kg# object moving at #5/2 m/s# slows to a halt after moving #12 m#, what is the coefficient of kinetic friction of the surface that the object was moving over?

##### 1 Answer

Apr 15, 2018

The coefficient of kinetic friction is

#### Explanation:

Apply the equation of motion

To calculate the acceleration

The initial velocity is

The final velocity is

The distance is

The acceleration is

According to Newton's Second Law, the force of friction is

The normal force is

The coefficient of kinetic friction is