Suppose a highway curve is properly banked to eliminate friction for a speed of 45 mph.If your tires were bald and you wanted to avoid sliding on the road,you would have to drive
A) somewhat below 45 mph.
B) somewhat above 45 mph.
C) at exactly 45 mph.

Question

Quizplus · Accepted Answer

A properly banked curve is designed so that at a specific speed (in this case, 45 mph), the necessary centripetal force is provided by the normal force alone, without the need for friction. Therefore, to avoid sliding with bald tires, you should drive at exactly 45 mph.

Suppose a Highway Curve Is Properly Banked to Eliminate Friction