Coefficient of Static Friction (inclined)

[Gray14]

Hi. During the completion of a physics lab i came across a problem. The lab consisted of putting a wooden block (0.10kg) at the en of a wooded board (1.84m), then lifting the wooden block side up slowly, so that when the block began to slide, we could record the height. The problem is finding the coefficient of static friction. The formula provided by the teacher was µs = x/y. Is this the correct formula? After trying it, the number came out to be 3 point something, much too large i supose, but when i divided the y by the x it came out to be 2.7. Am i just doing something wrong, or is the incorrect equation given? Thanks.

m_s = 0.10kg
l_board = 1.84m
x = 1.77m
y = 0.49m



µs = x/y ??



x was calculated, turning the given formula around gave me the supposed correct answer.



Thanks

 

[Mattowander]

It looks correct to me.

 

[Gray14]

K thx, this part of my assignment relies on your judgement...

 

[Mattowander]

Actually I'm sorry, I looked at the wrong equation. It should be y/x not x/y. I got .28