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What is the normal component of acceleration at time $t=1$ for an object whose position vector changes according to the function:

$${\bf r}(t)=t^3{\bf i} +(2t^2+1){\bf j}$$

$\cfrac{34}{5}$

$-\cfrac{12}{5}$

$\cfrac{34}{25}$

$0$

$\cfrac{12}{5}$