(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

a block of mass 100 kg is being moved steadily by pulling on a rope attached to the block making an angle of 30 degree with the horizontal. if the tension of the rope is 120 N, what is the coefficient of friction?

2. Relevant equations

T- Ff = ma

F= μR

3. The attempt at a solution

R= mg cos x = 850 N

mg sin x = 490 N

a = 0, F= Ff

Ff = 120 N

F= μR

120= μ(850)

μ= 0.141

* ( answer given μ= 0.113. where is my mistake?)

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: A block of mass 100 kg is being moved steadily by pulling on a rope at

**Physics Forums | Science Articles, Homework Help, Discussion**