Answer
$19\frac{m}{s}$
Work Step by Step
We know that
$N-mg=-ma_c$
$\implies 0-mg=-\frac{mv^2}{r}$
This simplifies to:
$v=\sqrt{rg}$
We plug in the known values to obtain:
$v=\sqrt{(35)(9.81)}$
$v=19\frac{m}{s}$
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