Answer
$F = 4.82\times 10^5~N$
Work Step by Step
We can find the angular speed:
$\omega = (320~rev/min)(\frac{2\pi~rad}{1~rev})(\frac{1~min}{60~s}) = 33.51~rad/s$
We can find the force on the bolt:
$F = m~\omega^2~r$
$F = (110~kg)(33.51~rad/s)^2(3.90~m)$
$F = 4.82\times 10^5~N$
