If I fire a gun while near light speed, will the bullet ...
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At so-called Newtonian (i.e., slow) speeds, the term uv / c ² is pretty close to 0, and the equation reduces down to the familiar w = u + v. However, if we are traveling at, say, 0.9 c (nine-tenths the speed of light), and we shoot a bullet forward also at 0.9 c, we discover via the above formula that the slug doesn't attain an overall speed ...