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Emilyneedshelp
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Homework Statement
A board that is of length L = 6.0 m and weight W = 335.7 N rests on the ground and against a frictionless contact at the top of a wall of height h = 2 m (see figure). The board does not move for any value of
Homework Equations
Σt=0
F(roller)=Fs
Fn=W
Fs=Fn(μ)
Horizontal Forces.
F(roller) is the horizontal force are the roller point.
Fs is the force of friction at the point of contact with the ground and direction towards the wall
Vertical Forces.
Fn is the normal force from the point of contact.
W is the force of the rod.
The Attempt at a Solution
Fn=335.7
Fs=335.7μ
F(roller)=335.7μ
Σt=0=Fs*d+Fn*d+W*d1-F(rol)*d2
d=0,[Fs*d+Fn*d]=0
Σt=0=W*d1-F(rol)*d2
F(rol)*d2, d2=h
Fr(2)=W*d1
W*d1,
d1= L/2cos65
[335.7(6/2)(cos65)]/2=Fr
Fr=335.7μ
( [335.7(6/2)(cos65)]/2 )/335.7 =μ
Am I making a huge mistake with my thought process?
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