How do change the formula for momentum to calculate it with a coefficient of kinetic friction
I'm not sure what you're asking, can you be more specific? When a body feels a frictional force, to find the momentum you must first integrate the acceleration function to find velocity. If you're trying to do a specific problem, I would draw a free-body diagram.
[tex]p(1)+\int Fdt=p(2) [/tex]
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