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Static and Kinetic Friction A 25 kg crate is placed on a concrete surface. If the...

Static and Kinetic Friction
A 25 kg crate is placed on a concrete surface. If the coefficient of static friction is 0.60, how much horizontal force is needed to push the crate from rest? If it takes a horizontal force of 78 N to keep the crate moving at constant velocity, what is the coefficient of kinetic friction?

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