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Chrismacs
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Homework Statement
Well I am trying to figure out how to find mu if you don't know the force of friction
Homework Equations
An example is a 2.25 kg block is accelerating at an acceleration of 5 m/s/s and is on a 40 degree
ramp. What is the force of friction and what is mu?
The Attempt at a Solution
When I first look at this problem I write what I know
a=5 m/s/s
m=2.25kg
theta=40
and the equations I know:
Fw=m*g
Fnetx(perp)=sin(theta)*w
Fnety(perp)=cos(theta)*w
Ff=mu*Fn
Fn=Fwperp
But you see I think I am doing this problem wrong here because wouldn't the force of the weight parallel be greater than the force of friction?
Please if you can answer ant of my questions will you please do so.
Thank you!
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