# Maximum attainable speed.

1. Jun 20, 2011

### bodhi

please let me kno what is the max speed an electron can attain,and max speed an atom can be projected with.now if we consider max attainable speed of electron 0.8c,then if we have a carrier travelling 0.1c,then will electron achieve speed 0.9c. simply speaking can any particle attain speed more of its capability with the help of a carrier.

2. Jun 20, 2011

### WannabeNewton

In SR, the velocity of an observer, if you plot it on a graph, will be asymptotic to the line representing the speed of light (d = t). You don't simply add two velocities or subtract like you would normally in euclidean n - space. Read this: http://en.wikipedia.org/wiki/Velocity_addition and look at the SR velocity - addition formula. Disregarding equipment and practicality and whatnot, you could keep raising the electron's speed but it would always be asymptotic to that of v = c.

3. Jun 20, 2011

### kmarinas86

c minus 10E-infinity lol

4. Jun 20, 2011

### markevail

If an object "A" does not have a force acting on it, it is at rest. If an object leaves our solar system with enough fuel to get close to a speed of light. The fuel runs out there is nothing to make the object go faster. The Speed of the object in relation to itself is zero but it sees the solar system it came from as having a velocity of close to the speed of light moving away from it. A body at rest is in a relation to itself.
If two objects are sent out from our solar system in opposite directions the solar system will see each of the objects as close to the speed of light. The objects will each see the solar system as moving away from them at say 99% the speed of light. The other object will be seen to be moving away at close to 99.5% the speed of light. Velocity is not measured in relativity as in Newtonian Physics. Bu they can be calculated from an object at rest.