Question

Um automóvel de 1400kg consegue atingir a velocidade de 108km/h (30m/s) em 10s. Calcule sua potência média

Answer 1

$\mathtt{\Delta~s=30.10=300m}\\\mathtt{a=\dfrac{30}{10}=3m/{s}^{2}}\\\mathtt{F=1400.3=4200N}\\\mathtt{W=4200.300=1260000\,J}$

$\mathtt{P=\dfrac{W}{\Delta\,t}}\\\mathtt{P=\dfrac{1260000}{10}}$

$\huge\boxed{\boxed{\mathtt{P=126000\,W}}}$