What is coefficient of kinetic friction between sled
Physics
A sled is pulled with a horizontal force of 20 N along a level trail, and the
acceleration is found to be 0.35 m/s2. An extra mass m = 4.2 kg is placed on the
sled. If the same force is just barely able to keep the sled moving, what is the
coefficient of kinetic friction between the sled and the trail?
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