# If a #8 kg# object moving at #16 m/s# slows to a halt after moving #80 m#, what is the coefficient of kinetic friction of the surface that the object was moving over?

##### 2 Answers

#### Answer:

0.16

#### Explanation:

Clearly,here the frictional force caused retardation of the moving object and brought it to rest.

So,using

We get,

Now,if the coefficient of kinetic friction is

So,we using

We, get

Or,

#### Answer:

The coefficient of kinetic friction is

#### Explanation:

The mass of the object is

The acceleration due to gravity is

The Normal reaction is

The initial velocity is

The final velocity is

The distance is

Apply the equation of motion,

The acceleration is

According to Newton's Second Law

The force of friction is

The coefficient of kinetic friction is