4-2.Friction
medium

જો $A$ નો પ્રવેગ $2 \,m / s ^2$ છે. જે $B$ નાં પ્રવેગ કરતાં ઓછો છે, તો $B$ વડે $A$ ઉપર લગાડવામાં આવતાં ઘર્ષણ બળનું મુલ્ય ....... $N$

A

$50$

B

$20$

C

$10$

D

આમાંથી કોઈ નહીં

Solution

(c)

Ref. image $I$

Given that acceleration of block B is $2 m / sec ^2$

Drawing $FBD$ of $A$ ref. image $II$

$f _2$ frictional force due to $B$

Now $=\frac{ f }{ m }= a$

$\Rightarrow \frac{ f }{5}=2$

$\Rightarrow f _2=10\,N$

$10\,N$ of frictional force is applied by $B$ on $A$

Standard 11
Physics

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