# Ehw2_key

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: t i− j 2 2 1+ t 1− t 2 d. N(t ) = i− j+ k 2 2 2 e. None of these. c. N(t ) = 12. The curvature 2 a. κ = 8 1− t2 2 b. κ = 4 1− t2 2 c. κ = 2 1− t2 2 d. κ = 1− t2 e. None of these. 13. The tangential component of acceleration 2 a. aT = 1− t2 b. aT = 0 c. aT = 2 2 d. aT = 2 1− t2 e. None of these. 14. The normal component of acceleration a. aN = 0 b. aN = 2 c. aN = d. aN = 2 1− t2 2 2 1− t2 e. None of these. In problems 15-20 interpret r (t ) = 4cos(t )i + 3tj − 4sin(t )k as the position of a moving object at time t. Find: 15. The unit tangent vector 16. The principal normal vector 17. The binormal vector 18. The curvature 4 a. κ = 5 b. κ = 4 4 c...
View Full Document

## This homework help was uploaded on 02/17/2014 for the course MATH 2433 taught by Professor Blecher during the Fall '08 term at University of Houston.

Ask a homework question - tutors are online