Centripetal Acceleration with infinite Radius?

[litzkrieg]

Centripetal Acceleration with infinite Radius??

Homework Statement

Find centripetal acceleration given speed is 38m/s and radius is infinity large

The Attempt at a Solution

So The answer would get infinitely smaller so is zero the best answer?

 

[rock.freak667]

I would say so, but usually even if it was considered infinitely large it would still have a centripetal acceleration e.g. r = 40 km.

However, how the question states it, r→ ∞ so v²/r → 0.