The energy of movement
EVERYTHING THAT MovES HAS ENERGY called "kinetic" energy. The fast object moves and the more mass it has, the more kinetic energy it has. l 1686 the German mathematician Gottfried Wilhelm Leibniz (1646-1716 introduced the term vis viva, meaning living force, which was very to the idea of kinetic energy that was worked out in the 1800s. Tl vis viva of an object depended on its mass and speed. Scientists noti that this energy seemed to be "conserved" a moving ball could transfer its energy to a stationary one. However, when a moving obje material, such as sand, it is obvious that the energy is n WHAT THE conserved because the sand seems to absorb the movement. This puzz GREEKS THOUGHT The Greek philosopher Aristotle remained unsolved until it was shown that moving objects have ene e towards the "natural that can be changed into other forms (pp. 24-25). Thus, when a movi place" because of their nature. A stone is heavy, so it will fall. I object hits sand the energy is not lost, but changed into a form such a a bird's nature to fly. Because heat. All forms of energy are either kinetic or potential energy (pp.14-15 these ideas seemed correct, no one tested them to find out w ether they were true. Indeed, it was 2,000 years later tha rted experimenting in motion and challenging Aristotle's vnew Taco object e same mass SAME MASS, Two objects of the SPEEDS (left and abov same mass trav different speeds have different amounts kinetic energy. A ball wit