You are riding a rollercoaster going around a vertical loop, on the inside of the loop. If the loop has a radius of $30$ meters, how fast must the cart be moving in order for you to feel three times as heavy at the top of the loop?

$34\mathrm{.}3\frac{m}{s}$

$29\mathrm{.}7$ m$/$s

$24\mathrm{.}3\frac{m}{s}$

Not enough information.