42.0-kg crate, starting from rest, is pulled acrossa floor with a constant horizontal force of...
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Physics
42.0-kg crate, starting from rest, is pulled acrossa floor with a constant horizontal force of 225 N.For the first 11.0 m the floor is frictionless, and forthe next 10.0 m the coefficient of friction is 0.20.What is the final speed of the crate after being pulled these 21.0 m?
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