The elements of a wheel-height adjuster for a lawn mower are shown. The wheel (partial outline shown dashed for clarity) bolts through the hole at A, which goes through the bracket but not the housing H. A pin fixed to the back of the bracket at B fits into one of the seven elongated holes of the housing. For the position shown, determine the magnitude of the force at the pin B and the magnitude of the reaction at the pivot O. The wheel supports a force of magnitude W/4, where W is the weight of the entire mower.

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A: tanθ1=a+ba-btanθ1=2.2+1.12.2-1.1θ1=71.56o∑Fv=0RA+RB-mg=0RA+RB=mgRA+RB=175×9.81RA+RB=1716.75 N ,…

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Crystalline Imperfections

The crystalline imperfections are described as the geometrical defects in the crystal due to incorrect arrangement of atoms, impurity, vacancy, and many more. It is not possible to achieve a perfect or ideal crystal, practically.