Relativistic momentum of rigid bodies


In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
In classical mechanics, the kinetic energy of a non-rotating object of mass m traveling at a speed v is equal to the mass multiplied by the square of the speed, multiplied by the constant 1/2.
In relativistic mechanics, this is a good approximation only when v is much less than the speed of light. If a body’s speed is a significant fraction of the speed of light, it is necessary to use relativistic mechanics.
The momentum of an object accelerating from rest to a relativistic speed is related to the velocity, the mass and the speed of light.

Related formulas


pMomentum (kg*m/sec)
mMass (kg)
vVelocity (m/sec)
cSpeed of light