Answer to Question #169199 in Electricity and Magnetism for madison

Question

You are skateboarding to school and realize that you are late. If you double your pace, by what factor would your mechanical kinetic energy increase?

Answer 1

$E=\frac{mv^2}{2},\\ E\sim v^2,$

$\frac{E_2}{E_1}=\frac{(2v)^2}{v^2}=4.$