Elastic relativistic collision

[Geocentric]

# In a perfectly elastic relativistic collision, which one of the following quantities is not conserved:

a)Momentum

b)Energy

c)Rest mass

d)Angular momentum

In non relativistic elastic collisions, energy and momentum will be conserved. But I don’t know about relativistic elastic collisions. Could anyone please explain? Can we apply the Newtonian concepts in these cases? Suppose the collision is inelastic (relativistic), then which quantity will be conserved?

[Tim_Lou]

angular momentum

 

a) relativity is based on [math]\vec{F}=\frac{d\vec{p}}{dt}[/math] so that momentum is conserved when there is no external force

 

b) the concept of energy is never violated in relativity

c) rest mass is a constant... so, its a constant

 

d) in relativity, the position vector undergoes complicated transformation when switching frames of references. since angular momentun involves a cross product with the position vector, it is not generally conserved in relativity