A system consisting of light wires and blocks is released from rest as shown in figure. The coefficient of kinetic friction between the blocks and surfaces is 0.1 and masses of blocks `m_(1), m_(2)` & `m_(3)` are 4 kg,4kg and 2 kg respectively. The cross section of the wire between `m_(2)` and `m_(3)` is 0.003 `cm^(2)` and its Young's Modulus is `2 xx 10^(11) N//m^(2)`. Calculate
the acceleration of the block `m_(2)`.
(b) the longitudinal strain developed in the wire `m_(2)` and `m_(3)`.

Answer

(a) `2m//s^(2) `, ( b) `1.164 xx 10^(-4)`