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.
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Captions provided by CCTubes – Captioning the Internet! Energy is the most powerful and useful concept in all of physics, but what exactly is it?
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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:
Big Bang
CoolAsCats
David Nicklas
Faisal Saud
Anton Lifshits
Joey Redner
Quasar
Tambe Barsbay
Mayank M. Mehrota
Mars Yentur
Mark Rosenthal
Dean Fuqua
Justin Lloyd
Roman Pinchuk
Hypernova
Shaun Williams
Edmund Fokschaner
Max Levine
Matthew O’Connor
Eugene Lawson
Martha Hunt
Joseph Salomone
Chuck Zegar
Jordan Young
Ratfeast
John Hofmann
Barry Hatfield
Craig Peterson
Thanks to our Patreon Gamma Ray Burst Supporters:
Jane Myers
Brandon Cook
James Flowers
Greg Allen
Denys Ivanov
Nick Virtue
Alexey Eromenko
Nicholas Rose
Scott Gossett
Mark Dykstra
Mark Vasile
Patrick Murray
Sultan Alkhulaifi
Alex Seto
Michal-Peanut Karmi
Erik Stein
Daniel Lyons
Kevin Warne
JJ Bagnell
J Rejc
Avi Goldfinger
John Pettit
Florian Stiglmayr
Benoit Pagé-Guitard
Nathan Leniz
Jessica Fraley
Loro Lukic
Brandon Labonte
David Crane
Greg Weiss
