Question

You're driving your pickup truck around a curve with a radius of 22meters. A box in the back of the truck is pressed up against the wall of the truck.
-How fast must you drive so that the force of the wall on the box equals the weight of the box?

Answer 1

If the centripetal force on the box equals the weight,
V^2/R = g
V = sqrt(R*g) = 14.7 m/s

Answer 2

V^2/R = gu
V = sqrt(R*g*u) = 13.133 m/s
u is the coefficent of static friction. Since this is steel on steel, u=0.1