Question

If a certain car, going with speed v1, rounds a level curve with a radius R1, it is just on the verge of skidding. If its speed is now doubled, the radius of the tightest curve on the same road that it can round without skidding is:
A) 2R1
B) 4R1
C) R1/2
D) R1/4
E) R1

Answer

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