A force $\vec{F}=\hat{i}+4 \hat{j}$ acts on block shown. The force of friction acting on the block is
A force $\vec{F}=\hat{i}+4 \hat{j}$ 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
$-3 \hat{i}$
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