Answer
$196\frac{m}{s}$
Work Step by Step
We know that
$a_c=\frac{v^2}{r}$, where $a_c$ shows centripetal acceleration
This simplifies to:
$v=\sqrt{ra_c}$
We plug in the known values to obtain:
$v=\sqrt{(0.075m)(52000)(9.81\frac{m}{s^2})}$
$v=196\frac{m}{s}$
