A block of mass \( 0.1 \mathrm{~kg} \). is pressed against a wall with a horizontal force of \( ...

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A block of mass \( 0.1 \mathrm{~kg} \). is pressed against a wall with a horizontal force of \( 5 \mathrm{~N} \) as shown in the figure. If the coefficient of friction between the wall and the block is \( 0.5 \) then the frictional force acting on the block will be \( \left(g=9.8 \mathrm{~m} / \mathrm{s}^{2}\right) \) :-
-(1) \( 9.8 \mathrm{~N} \)
(2) \( 2.5 \mathrm{~N} \)
-(3) \( 0.98 \mathrm{~N} \)
(4) \( 0.49 \mathrm{~N} \)
\( \mathrm{P} \)
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