How Long Will It Take to Stop a Sled?

[srishtig]

Homework Statement

While sledding you reach the flat bottom of the hill while moving 8.0 m/s^2. The μ (kinetic) between the sled and snow is μk= .080. The mass of you and the sled is 95 kg. How long does it take to stop the sled?

I'm not sure how to do this problem and I've been trying for a while. if i could please get some help i would greatly appreciate it!

 

[ideasrule]

First, what acceleration does the friction provide?

 

[srishtig]

im not even really sure how to do that