A race car will make one lap around a circular track of radius R. When the car has traveled halfway around the track, what is the magnitude of the car's displacement from the starting point?

Question

Quizplus · Accepted Answer

When the car has traveled halfway around the circular track, it is at the point directly opposite the starting point on the circle. The displacement is the straight-line distance between the starting point and this point, which is the diameter of the circle, equal to 2R.

A Race Car Will Make One Lap Around a Circular π\piπ

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