The newton is the SI unit for force; it is equal to the amount of net force required to accelerate a mass of one kilogram at a rate of one meter per second squared.

1 N = 1 kg·m/s^2

The joule is a derived unit of energy or work in the International System of Units. It is equal to the energy expended (or work done) in applying a force of one newton through a distance of one metre (1 newton metre or N·m)

J = 1 kg·m^2/s^2

Брей, вярно има някаква магия, така да се получи да се въртят съставките на формулите и енергията да е равна на маса по скорост на квадрат! Много интересно.