A perfect smooth sphere A of mass \( 2 \mathrm{~kg} \) is in contact with a rectangular block \(...

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A perfect smooth sphere A of mass \( 2 \mathrm{~kg} \) is in contact with a rectangular block \( B \) of mass
\( \mathrm{P} \) \( 4 \mathrm{~kg} \) and vertical wall as shown in the figure. All

W surfaces are smooth. Find normal reaction by vertical wall on sphere A :-
(1) \( 20 \mathrm{~N} \)
(2) \( 25 \mathrm{~N} \)
(3) \( 80 \mathrm{~N} \)
(4) \( 45 \mathrm{~N} \)
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