A point is moving with position vector

Python Inputs:

import numpy as np

from sympy import $*$

t $=$ symbols$(\text{'}$t$\text{'},$ real $=$ True$)$

r $=$ Matrix$([-$t$**2-$ t $+2,-$t $-3,0])$

t$\_$v $=2$

What is the normal basis vector

at

$?$

$-1$

$0\%$