A force \( \overrightarrow{\mathrm{F}}=\hat{\mathrm{i}}+4 \hat{\mathrm{j}} \) acts on block show...

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A force \( \overrightarrow{\mathrm{F}}=\hat{\mathrm{i}}+4 \hat{\mathrm{j}} \) acts on block shown. The force of friction acting on the block is :
(A) \( -\hat{i} \)
(B) \( -1.8 \hat{i} \)
(C) \( -2.4 \hat{i} \)
(D) \( -3 \hat{i} \)
\( \mathrm{P} \)
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