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

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A block of mass \( 0.1 \mathrm{~kg} \) is held against a wall applying a horizontal force of \( 5 \mathrm{~N} \) on the block. If the co-efficient of friction between the block and the wall is \( 0.5 \), the magnitude of the frictional force acting on the block is
(A) \( 2.5 \mathrm{~N} \)
(B) \( 0.98 \mathrm{~N} \)
(C) \( 4.9 \mathrm{~N} \)
(D) \( 0.49 \mathrm{~N} \)
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