Energy is the most powerful and useful concept in all of physics, but what exactly is it?
You can further support us on Patreon at https://www.patreon.com/pbsspacetime
Get your own Space Time tshirt at http://bit.ly/1QlzoBi
Tweet at us! @pbsspacetime
Email us! pbsspacetime [at] gmail [dot] com
Comment on Reddit: http://www.reddit.com/r/pbsspacetime
Help translate our videos!
Kronos: Devourer of Worlds
Written and Hosted by Matt O'Dowd
Produced by Rusty Ward
Graphics by Matthew Ranker
Assistant Editing and Sound Design by Mike Petrow and Meah Denee Barrington
Made by Kornhaber Brown (www.kornhaberbrown.com)
In physics energy is not a substance, nor is it mystical. Energy is a number. A quantity. And the quantity itself isn’t even particularly fundamental. Instead, it’s a mathematical relationship between other, more fundamental quantities. It was 17th century polymath Gottfried Leibnitz who first figured out the mathematical form of what we call kinetic energy – the energy of motion. He realized that the sum of mass times velocity squared for a system of particles bouncing around on a flat surface is always conserved, assuming no friction and perfect bounciness. Leibnitz called this early incarnation of energy vis viva – the living force.
Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters:
Mayank M. Mehrota
Thanks to our Patreon Gamma Ray Burst Supporters: