Calculate force of friction using tension & angles

[bhangu23]

Homework Statement

A 60 kg crate is being steadily dragged along the floor by a rope, which makes an angle of 70 degress with the horizontal. If the tension in the rope is 20N:
What is the force of friction?
What is the coefficient of friction?

Homework Equations

ffr=Ufn
ffr=Umgcos0

The Attempt at a Solution

i know that
fg=mg
= 60(9.8)
=588N

and
Fn= fgcos70
=588cos70
=201N

i don't knwo what to do from there

 

[bhangu23]

anyone?

 

[slider142]

I'm not sure why your normal force is Fg*cos(70). From my diagram, I get the force of friction |Ff| = |Fg| - |T|sin(70) where T is the tension.