Answer
$u=0.84c$
Work Step by Step
The formula for relativistic speed is:
$u=\frac{u^{\prime}+v}{1+\frac{u^{\prime}v}{c^2}}$
We plug in the known values to obtain:
$u=\frac{0.47c+0.62c}{1+\frac{0.47\times 0.62}{c^2}}$
$u=0.84c$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.