A body of mass 2 ,kg is kept by pressing to a vertical wall by a force of 100, N . coefficient of fr

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4-2.Friction

easy

A body of mass $2 \,kg$ is kept by pressing to a vertical wall by a force of $100\, N$. The coefficient of friction between wall and body is $0.3.$ Then the frictional force is equal to ........ $N$

A

$6$

B

$20$

C

$600$

D

$700$

Solution

(b) For the given condition,

Static friction = Applied force = Weight of body

$ = 2 \times 10 = 20\;N$

Standard 11

Physics

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