Figure shows a force F= hati+4 hatj acts on a 1kg block . What is the force of friction acting on the block ?

Question

Figure shows a force F= hati+4 hatj acts on a 1kg block . What is the force of friction acting on the block ? <img class="img-fluid question-image" alt="Question" src="https://cdn.tardigrade.in/q/nta/p-unddmaxt9k12fwds.jpg" /> (A) - hati (B) -1.8 hati (C) -2.4 hati (D) -3 hati

Tardigrade Admin · Accepted Answer

f= hati+4 hatjm=1kg mg=10 N+4=mg N+4=10 N=6 Fm a x=μ N =0.3× 6=1.8N <img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/p-unddmaxt9k12hezi.jpg" /> Force in horizontal direction is 1N which is less than 1.8N then force of frictions is - hati

Q. Figure shows a force $F = \hat{i} + 4 \hat{j}$ acts on a $1 k g$ block . What is the force of friction acting on the block ?

$- \hat{i}$

$- 1.8 \hat{i}$

$- 2.4 \hat{i}$

$- 3 \hat{i}$

$f = \hat{i} + 4 \hat{j} m = 1 k g$
$m g = 10$
$N + 4 = m g$
$N + 4 = 10$
$N = 6$
$F_{ma x} = μ N$
$= 0.3 \times 6 = 1.8 N$

Force in horizontal direction is 1N which is less than 1.8N then force of frictions is $- \hat{i}$

Q. Figure shows a force F=i^+4j^​ acts on a 1kg block . What is the force of friction acting on the block ?

−i^

−1.8i^

−2.4i^

−3i^