If an object is moving at #6 m/s# over a surface with a kinetic friction coefficient of #u_k=20 /g#, how far will the object continue to move?
Your object will move under the acton of Friction that wll produe a negative acceleration and eentually stop it.
To find this acceleration we can use Newton's Second law:
where the only force will be friction (in the opposite direction to the movement so it will need to enter Newton's Law with a minus sign) given as:
So you have:
we now use the relationship: