X: Do not exceed, because E = mv^2, and doubling the speed confirms the energy. And don’t forget to turn on the lights.

Wow: I am embarrassed to ask, to what speed do you speed up the city, that to calculate the energy decided to use this formula?

Zzz: This formula will help you in a closed system to calculate the kinetic energy for any speed of any non-rotating body. Honestly yours Isaac Newton.