0 Members and 1 Guest are viewing this topic.

If two objects are launched in opposite directions from a central point and they are traveling from the point of origin at 3/4C how fast are they traveling away from one another?

Quote from: AllenG on 20/07/2009 01:04:53If two objects are launched in opposite directions from a central point and they are traveling from the point of origin at 3/4C how fast are they traveling away from one another?In relativity velocities don't add, you can't write V = v_{1} + v_{2}. The correct formula instead is:V = (v_{1} + v_{2})/(1 + v_{1}*v_{2}/c^{2})So, if v_{1} = v_{2} = (3/4)c, for example, you have:[(3/4)c + (3/4)c]/[1 + (9/16)] = (3/2)c/(25/16) = (24/25)c = 0.96c

Can you explain how you got that formula? Or why that is the case in relativity? I would like to know []