Find the Tension in the rope ( really simple )

[rulzwrld]

Find the Tension in the rope ...( really simple :D)

Homework Statement

A block pulled by a string is moving on a horizontal plane with a constant speed, it weighs 25.0 N and its coefficient of kinetic friction is 0.35 . Find the tension in the rope ?

Homework Equations

Fx = t - Fk
T = Fk = μk * N = μk *mg

The Attempt at a Solution

My answer results 85.84 N ... which is completely off the textbook answer 8.75 which can be yield by μk * m ... I don't understand why does it eliminate the 'g' out of the equation?

 

[heth]

Look at the units mentioned in the question.

 

[rulzwrld]

Lol , thanks, i actually came back coz i found the answer and I knew it was something really stupid ...

 

[heth]

No problem! Every year, the AP examiners' report mentions that many many points are lost because of units or calculation errors, so always check the units!