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October 23, 2014

October 23, 2014

Posted by **Billie** on Thursday, December 2, 2010 at 1:22pm.

What is is the greatest speed at which the SUV can negotiate the turn without rolling over?

- physics -
**drwls**, Thursday, December 2, 2010 at 2:37pmConsider the case where there is no force on the two wheels closest to the cetnter of the turn. Compute the speed at which that can happen by taking moments about the outer pair of wheels. Let the distance between right and left wheels be L = 1.8 m. The gravity torque M g L/2 must equal the centripetal torque

M V^2*h/R, where h = 1m is the height of the CM. M cancels out.

g L/2 = V^2 h/R

V = sqrt [R g L/(2h)

A wide wheelbase (L) and a low center of mass (h) helps prevent high speed flipping.

At higher values of V, dynamic equilbrium cannot be maintainewd.

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