Two blocks, A and $B($with mass $40$ kg and $130$ kg $,$ respectively$),$ are connected by a string, as shown in the figure below. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is ${}_k=0\mathrm{.}28.$ Determine the change in the kinetic energy of block $A$ as it moves from $C$ to $($D$),$ a distance of $18$ m up the incline $($and block $B$ drops downward a distance of $18$ m $)$ if the system starts from rest.

Your response differs from the correct answer by more than $100\%.$J

$($i$)$

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