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In the shown figure, four blocks A, B ,C...

In the shown figure, four blocks `A, B ,C` and `D` are connected by three ideal strings. Coefficient of friction between `A,B` and surface is `0.2`. The mass `A, B` and `D` are of `5 kg` and `C` is of `m kg.f_(A)` and `f_(B)` are the frictional forces action on `A` and `B` respectively. The system is allowed to move. Based on the above data answer
the following questions. ( Take `g=10m//s^(2)`)

If `m=5 kg`, then

A

`T_(2)=50N, f_(A)=f_(B)=10N`

B

`T_(2)=40N,f_(A)=f_(B)=10N`

C

`T_(2)=50 N, f_(A)=f_(B)=0`

D

`T_(2)=40N, f_(A)=f_(B)=0`

Text Solution

Verified by Experts

The correct Answer is:
C
Since in absence of friction no motion will occur. So no friction force will act on any mass.
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