Energy

• Newton:

  • kinetic energy: Ekin= ½ m v2
  • v=0  Ekin= 0

• Einstein:

  • E =  m0 c2
  • v=0  E= m0 c2 “rest energy”
  • Ekin = (-1) m0 c2

• Example: The rest energy of an average person can cover the world energy need for 45 days !!!!

Notes: