Applied Mechanics and Graphic Statics
A vehicle weighing w kg is to run on a circular curve of radius r. If the height of its centre of gravity above the road level is h and the distance between the centres of wheels is 2a, the maximum velocity, in order to avoid over turning, will be

∛(gra/h)
√(gra/h)
gra/h
4√(gra/h)

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Applied Mechanics and Graphic Statics
The following is not a law of static friction:

The force of friction is dependent upon the area of contact
The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces
The force of friction always acts in a direction opposite to that in which the body tends to move
The force of friction depends upon the roughness of the surface

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