(#5) [4 pts.] Here is the parametric curve associated with r(t) = (t, -t² + 4t). 4 3 1 0 2 3 4 We already know that v (t

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5 4 Pts Here Is The Parametric Curve Associated With R T T T 4t 4 3 1 0 2 3 4 We Already Know That V T 1 (19.92 KiB) Viewed 9 times

(#5) [4 pts.] Here is the parametric curve associated with r(t) = (t, -t² + 4t). 4 3 1 0 2 3 4 We already know that v (t)= (1, -2t+4). Using this information, determine the principal unit normal vector at t = 1. N (1) = ??? Hint: You should know a good trick for finding orthogonal vectors in 2D without using the long formula.