Is Static Friction Necessary on an Incline When Motion Stops?

AI Thread Summary
Static friction is not necessary on an incline when motion stops, as the focus shifts to the forces acting on the object at rest. The discussion highlights confusion about whether to use the coefficient of static or kinetic friction when calculating friction for a coin that comes to rest. It is clarified that when the coin is in motion and then stops, the coefficient of kinetic friction should be applied. The participants emphasize the importance of understanding the direction of friction, which acts up the incline. Overall, the conversation centers on the appropriate application of friction coefficients in different states of motion.
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Would you be able to list the "following circumstances" so we can help you?
 
Sorry about that, it wants to know what the friction is when the coin comes to rest. I know the direction of the friction is up the incline, but other than that I'm stuck.
 
if they ask you to find the friction of the coin in motion or in motion coming to rest then use coefficient of kinetic friction to calculate friction right?

do you know what the sum of all forces are in the x direction?
 
It doesn't give any forces in the x direction, just what I typed. So if it was in motion but came to rest I still use the coefficient of kinetic friction? I was using the coefficient of static friction. What I did was find the normal force and multiply by u static friction.
 

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