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  4. A perfect smooth sphere A of mass 2 kg is in contact with a rectangular block B of mass 4 kg and vertical wall as shown in the figure. All the surfaces are smooth. Find the normal reaction (in N ) by the vertical wall on sphere A.

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Q. A perfect smooth sphere $A$ of mass $2 \,kg$ is in contact with a rectangular block $B$ of mass $4 \,kg$ and vertical wall as shown in the figure. All the surfaces are smooth. Find the normal reaction (in $N$ ) by the vertical wall on sphere $A$.Physics Question Image

Laws of Motion

Solution:

image
From FBD of system "sphere $+$ block",$\frac{N}{60}=\frac{3}{4}$
$N=45 \,N$