Three blocks of masses 6 kg, 4 kg and 2 kg are pulled on a rough surface by applying a constant force 20 N. The values of coefficient of friction between blocks and suface are shown in figure.
Q. In the arrangement shoen tension in the string connecting 4 kg and 6 kg masses is

Options

A. `8N`
B. `12N`
C. `6N`
D. `4N`

Answer

A

Explanation

`T_(2)+4=20,T_(2)=16Nt`

`f_(2)=8,T_(2)=T_(1)+f_(2),T_(2)=T_(1)+8`
`T_(1)=8`

`f_(3)=8`