$G{}_s=0\mathrm{.}230a=1\mathrm{.}15mb=1\mathrm{.}75mc=0\mathrm{.}350mv=74\mathrm{.}0k\frac{m}{h}t=v=74\mathrm{.}0k\frac{m}{h}t=m=1400kg$ and a center $of$ mass located $atG.$ The coefficient $of$ static friction between the wheels and the road $is{}_s=0\mathrm{.}230.$ The dimensions are $a=1\mathrm{.}15m,b=1\mathrm{.}75m,$ and $c=0\mathrm{.}350m.$ Assume the car starts from rest, $,$ the wheels $do$ not slip $on$ the road, and that the car experiences constant acceleration. Neglect the mass $of$ the wheels. $(Figure1)$

Figure

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Part $A-$ Shortest Time $to$ Reach a Given Speed with Rear$-$Wheel Drive

Determine the shortest time $it$ takes the car $to$ reach a speed $ofv=74\mathrm{.}0k\frac{m}{h},$ starting from rest, $if$ the engine drives only the rear wheels.

Express your answer $to$ three significant figures and include the appropriate units.

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Part $B-$ Shortest Time $to$ Reach a Given Speed with Front$-$Wheel Drive

Determine the shortest time $it$ takes the car $to$ reach a speed $ofv=74\mathrm{.}0k\frac{m}{h},$ starting from rest, $if$ the engine drives only the front wheels.

Express your answer $to$ three significant figures and include the appropriate units.

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$t=$