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I need to get the "rörelsefrictionskoefficient" (roughly translated movement frictions coefficient) from this task:

A sled is on a horizontal plane, a force of 750N is put on it from the left to the right, it is put in motion with an acceleration of 0.10m/s^2. What is the "rörelsefrictionskoefficient"?

The total mass of the sled is 420 kg.


Any tips? sollutions?
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