Q.

Assume body B to be uniform:(F is directed towards|centre of mass)

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a

a→q, b→p, c→p

b

a→q, b→r, c→q

c

a→q, b→p, c→r

d

a→q, b→r, c→p

answer is C.

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Detailed Solution

(a) To balance torque due to f, N will shift downwards(For rotational equilibrium τ→f=−τ→N (about C)(b) Normal will shift towards left.(For rotational equilibrium τ→f=−τ→N(c) Frictionless surface. So, no torque about C.M. Sonormal will not shift and will pass through C.M.
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Assume body B to be uniform:(F is directed towards|centre of mass)