What is the coefficient of kinetic friction in this problem?

AI Thread Summary
The discussion centers on finding the coefficient of kinetic friction (μk) in a physics problem involving a sled. Participants clarify that since the sled's velocity is constant, the acceleration is zero, indicating that the net force is also zero. One user mentions calculating the sled's mass as 23.98 kg, but others point out that this step was unnecessary since the weight (mg) was provided. To find μk, users suggest using the force of friction (Ff) as a key component in the calculations. The conversation emphasizes the importance of focusing on the correct variables to solve for the coefficient of kinetic friction.
JohnSmith12
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Thanks everyone for your help.
 
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The velocity is constant, and that means that the acceleration is zero. That has something to do with the net force...
 
JohnSmith12 said:
I solved for the mass of the sled, 23.98kg.
OK, but that step was unnecessary. (You were given mg, and that's what you need.)

JohnSmith12 said:
But without mk I'm having difficulty finding an answer.
mk, usually symbolized as ##\mu_k##, is what you are solving for. Use NTW's hint to determine for the force of friction, Ff. Then you can solve for the coefficient of friction.
 
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