Question: Why are roads often banked in a curve? l.e., the roadbed is tilted sideways so that the higher edge is on the outside of the

Why are roads often "banked" in a curve? l.e., the roadbed is tilted sideways so that the higher edge is on the outside of the curve, and the lower edge on the inside. (You can see this for instance in the construction of the new Hampton Roads Bridge-Tunnel). Explain how this helps to provide the necessary centripetal acceleration by discussing ALL forces acting on a car driving through that curve, and the resulting net force.

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