Two block A and B of equal mass are connected using a light inextensible string passing over two light smooth pulleys fixed to the blocks (see fig). The horizontal surface is smooth. Every segment of the string (that is not touching the pulley) is horizontal. When a horizontal force `F_(1)` is applied to A the magnitude of momentum of the system, comprising of A + B, changes at a rate R. When a horizontal force `F_(2)` is applied to B (`F_(1)` not applied) the magnitude of momentum of the system A + B once again changes at the rate R. Which force is larger `- F_(1) or F_(2)` ?

Answer

`F_(2)`