A force vec{F}=hat{i}+4 hat{j} acts on block shown. force of friction acting on block is

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4-2.Friction

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

A

$-\hat{i}$

B

$-18 \hat{i}$

C

$-2.4 \hat{i}$

D

$-3 \hat{i}$

Solution

(a)

Limiting friction $F_L=(0.3)(1)(g)$

$=3 \,N$

$x$-component or horizontal component of force is $=1 \,N$

hence this much of magnitude will act in backward direction due to friction.

Standard 11

Physics

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