Ok, this one has got me stumped. I have no idea what to do really.

Given $\displaystyle y^2=7x^3+7x$

where x and y are in meters and y is positive,

what is the normal component of the acceleration when

$\displaystyle x=3m, x=6m/s, x=4m/s^2$

I found when x = 3, y = 14.491 which i can find the magnitude and angle to plot on the x-axis. And i know i need velocity to define n-t direction, but thats all I got. I guess im confused from how its set out.

How do i approach this question?