In Figure, blocks $\backslash (\backslash$mathbf$\{$A$\}\backslash )$ and $\backslash (\backslash$mathbf$\{$C$\}\backslash )$ have the same weight and each weighs onefourth the weight of block $\backslash (\backslash$mathbf$\{$B$\}\backslash ).$ Blocks $\backslash (\backslash$mathbf$\{$A$\}\backslash )$ and $\backslash (\backslash$mathbf$\{$C$\}\backslash )$ are connected by a massless cord that passes over a massless and frictionless pulley. Assume that there is no friction between block $\backslash (\backslash$mathbf$\{$B$\}\backslash )$ and the surface on which it moves and that the coefficient of kinetic friction between blocks $\backslash (\backslash$mathbf$\{$A$\}\backslash )$ and $\backslash (\backslash$mathbf$\{$B$\}\backslash )$ is $\backslash (\backslash$mu$\_\{\backslash$mathrm$\{$k$\}\}=0\mathrm{.}2\backslash ).$ After the system is released, $[$Note that $\backslash (\backslash$mathbf$\{$A$\}\backslash )$ and $\backslash (\backslash$mathbf$\{$B$\}\backslash )$ move with different accelerations$],$ find:

a$.$ the distance block $\backslash (\backslash$mathbf$\{$A$\}\backslash )$ has moved in one second, and

b$.$ the distance block $\backslash (\backslash$mathbf$\{$B$\}\backslash )$ has moved in one second.