Solving for force with sliding friction

[rzlblrt417]

Homework Statement

A factory worker pushes a 30.0 kg crate a distance of 4.5 m along a level floor ata constant velocity by pushing horizontally on it. The coefficient of friction is .25.


I have been trying and i can't figure out how to solve this problem. Every attempt i make is dead end. I am not sure how to solve for the force will using the coefficient of friction.

Any help will be appreciated.

 

[PhanthomJay]

Newton's First Law states that a body at rest or moving in a straight line at a constant speed has no net force acting on it, that is, the sum of the forces (the net force) acting on it must be 0. Start from there, and please show your attempt. I assume the problem is asking you what is the force provided by the worker?