Answer
$a = 2400~m/s^2$
Work Step by Step
In part (b), we found that $v = 19~m/s$
We can find the magnitude of the tip's acceleration:
$a = \frac{v^2}{r}$
$a = \frac{(19~m/s)^2}{0.15~m}$
$a = 2400~m/s^2$
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