(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?)

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

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