A puck is sliding on flat ground with an intial speed

[SuperDuperSunny]

Homework Statement

A puck is sliding on flat ground with initial speed to 4 m/s and comes to rest after 2 s. Aprox. which is the coefficent of kinetic friction between puck and ground.
0.9
0.6
0.5
0.4
0.2
I don't know how to solve for this. I ended up in this class accidently and never took physics. If you can't give me the answer please point me in the right direction/formula.

Homework Equations

The Attempt at a Solution

 

[BvU]

Hello SDS

You could look in the formulas for uniform acceleration (deceleration in this case)...

 

[SteamKing]

Homework Statement

A puck is sliding on flat ground with initial speed to 4 m/s and comes to rest after 2 s. Aprox. which is the coefficent of kinetic friction between puck and ground.
0.9
0.6
0.5
0.4
0.2
I don't know how to solve for this. I ended up in this class accidently and never took physics. If you can't give me the answer please point me in the right direction/formula.

Let me guess: You wanted to study 'Psychics' but signed up for 'Physics' instead.

I bet if you ask your classmates, you'll probably find that some (or most) of them never studied physics before, either. Still, if you're not going to drop the class after realizing your mistake, you should at least make an effort to read and study the material.

For future reference, "I don't know how to solve this" is an insufficient reason for getting HW help at PF.