brazil-enem 2021 Q107

brazil-enem · Other · enem__day2 Not Maths
Analyzing the technical sheet of a popular automobile, some characteristics are verified in relation to its performance. Considering the same automobile in two versions, one of them running on alcohol and another on gasoline, we have the data presented in the table, in relation to the performance of each engine.
ParameterGasoline engineAlcohol engine
Accelerationfrom 0 to $100 \mathrm{~km/h}$ in $13.4 \mathrm{~s}$from 0 to $100 \mathrm{~km/h}$ in $12.9 \mathrm{~s}$
Maximum speed$165 \mathrm{~km/h}$$163 \mathrm{~km/h}$

Considering air resistance negligible, which version presents the greatest power?
(A) Since the gasoline version achieves the greatest acceleration, this is the one that develops the greatest power.
(B) Since the gasoline version reaches the greatest value of kinetic energy, this is the one that develops the greatest power.
(C) Since the alcohol version presents the greatest rate of change of kinetic energy, this is the one that develops the greatest power.
(D) Since both versions present the same change in velocity in the acceleration calculation, the power developed is the same.
(E) Since the gasoline version keeps the engine working for more time to reach 100 km/h, this is the one that develops the greatest power.
Analyzing the technical sheet of a popular automobile, some characteristics are verified in relation to its performance. Considering the same automobile in two versions, one of them running on alcohol and another on gasoline, we have the data presented in the table, in relation to the performance of each engine.

\begin{center}
\begin{tabular}{|l|l|l|}
\hline
Parameter & Gasoline engine & Alcohol engine \\
\hline
Acceleration & from 0 to $100 \mathrm{~km/h}$ in $13.4 \mathrm{~s}$ & from 0 to $100 \mathrm{~km/h}$ in $12.9 \mathrm{~s}$ \\
\hline
Maximum speed & $165 \mathrm{~km/h}$ & $163 \mathrm{~km/h}$ \\
\hline
\end{tabular}
\end{center}

Considering air resistance negligible, which version presents the greatest power?

(A) Since the gasoline version achieves the greatest acceleration, this is the one that develops the greatest power.\\
(B) Since the gasoline version reaches the greatest value of kinetic energy, this is the one that develops the greatest power.\\
(C) Since the alcohol version presents the greatest rate of change of kinetic energy, this is the one that develops the greatest power.\\
(D) Since both versions present the same change in velocity in the acceleration calculation, the power developed is the same.\\
(E) Since the gasoline version keeps the engine working for more time to reach 100 km/h, this is the one that develops the greatest power.