16.1 Momentum and Inertia in Relativity ­ 16.2 Equivalence of Mass and Energy.notebook
February 13, 2017
Relativity­Momentum, Mass, Energy, and Gravity
relativistic momentum:
• as object approaches the speed of light its momentum increases dramatically
• cannot accelerate anything to speed of light, or beyond it
rest mass: m in equation; constant property of the object no matter its speed
rest energy: "energy of being", energy at rest, even if it isn't interacting with anything else
more speed = more momentum
"stiffer" trajectory when particle has large momentum
An electron and a positron meet, each with a rest mass of 9.11 x 10­31 kg, and are converted to energy (gamma rays). How much energy is converted from the rest energy into gamma rays in the collision?
1.64 x 10­13 J
mass and energy are equivalent ­ anything with mass has energy