Question

What is relation between velocity addition for non relativist and relativist?.​

Answer 1

Answer:

With classical velocity addition, velocities add like regular numbers in one-dimensional motion: u = v + u′, where v is the velocity between two observers, u is the velocity of an object relative to one observer, and u′ is the velocity relative to the other observer.

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Answer 2

Answer:

With classical velocity addition, velocities add like regular numbers in one-dimensional motion: u = v + u′, where v is the velocity between two observers, u is the velocity of an object relative to one observer, and u′ is the velocity relative to the other observer.

When two objects are moving slowly compared to speed of light, it is accurate enough to use the vector sum of velocities: s=u+v s = u + v . As the velocity increases towards the speed of light, the vector sum of velocities is replaced with: s=v+u1+vu/c2 s = v + u 1 + vu / c 2 .