Q.

If the coefficient friction between A and B is μ , the maximum acceleration of the wedge A for which B will remain at rest with respect to the wedge is

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a

μg

b

g1+μ1−μ

c

g1−μ1+μ

d

answer is B.

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Detailed Solution

For maximum acceleration body as a tendency to go up and friction acting down the plane.macosθ=mgsinθ+fmacosθ=mgsinθ+μmasinθ+mgcosθa=g+μa+g            θ=45oa=g1+μ1−μ
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If the coefficient friction between A and B is μ , the maximum acceleration of the wedge A for which B will remain at rest with respect to the wedge is