A block of 1, kg is stopped against a wall by applying a force F perpendicular to wall. If μ = 0.2

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4-2.Friction

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A block of $1\, kg$ is stopped against a wall by applying a force $F$ perpendicular to the wall. If $\mu = 0.2$ then minimum value of $F$ will be ....... $N.$

A

$980 $

B

$49$

C

$98$

D

$490$

Solution

(b)$F = \frac{W}{\mu } = \frac{{1 \times 9.8}}{{0.2}} = 49\,N$

Standard 11

Physics

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(AIPMT-2004)