posted by amanda .
A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?
What does the "u" stand for?
ex.... m = mass
coefficent of friction. Normally we abreviate it with "mu", the sound of the Greek letter that looks like a u.