Frictional Force: Solve 2m/s in 2s

[frostsabre]

Edit: I am going to make it a little bit more simple so ill just be needing help on a problem which I would use as a reference.
Problem: Solve for the Frictional force of a block moving at a horizontal surface at a velocity of 2m/s and stops in 2s.

 

[cupid.callin]

what do you think about the question?

 

[cupid.callin]

you have v_initial, v_final, time

so you can find a

now list all the forces acting on the body in horizontal direction

then use ΣF = ma and find the frictional force...

Now use the relation of frictional force and normal rxn of body!

PS: post new replies instead of editing original message. most members use the name of last person who posted to see if there is a new reply or not