Homework Help: Physics

Posted by amanda on Tuesday, October 5, 2010 at 11:55am.

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?

Physics - bobpursley, Tuesday, October 5, 2010 at 11:57am
http://www.jiskha.com/search/index.cgi?query=+A+120-kg+crate%2C+starting+from+rest%2C+is+pulled+across+a+floor+with+a+constant+horizontal+force+of+400+N.+For+the+first+17+m+the+floor+is+frictionless%2C+and+for+the+next+17+m+the+coefficient+of+friction+is+0.34.+What+is+the+final+speed+of+the+crate%3F+
Physics - amanda, Tuesday, October 5, 2010 at 11:58am
What does the "u" stand for?

ex.... m = mass
Physics - bobpursley, Tuesday, October 5, 2010 at 12:37pm
coefficent of friction. Normally we abreviate it with "mu", the sound of the Greek letter that looks like a u.

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