Two block  `A and B` of mass `m_(A)= 10 kg` and `m_(A) = 20 kg ` are place on rough horizontal
Channel: Doubtnut
Date: 2020-07-26

Two block  `A and B` of mass `m_(A)= 10 kg` and `m_(A) = 20 kg ` are place on rough horizontal surface . The blocks are connected with a string. If the coefficient of fraction between block `A` and ground is ` mu _(A) = 0.9` and between block `B` and ground is `mu _(B) = 0.3 ` and the tension in the string in situation as shown in fig force `120 N `and `100 N` start acting when the system is at rest?