# If a #2 kg# object moving at #9 m/s# slows down to a halt after moving #2 m#, what is the friction coefficient of the surface that the object was moving over?

##### 2 Answers

By conservation of energy the initial KE of the object must be same as the work done by it against the frictional force. So

Where

From (1)

Sep 12, 2016

#### Answer:

Alternate solution.

#### Explanation:

Using the kinematic equation

Decelerating force due to friction is

Equating it with Force due to friction

Solving for