- #1
kekal6
- 9
- 0
H(x,y)=<x^2/4,y^2/9,xy> the region E is 9x^2+4y^2<=36
also wat is given is the work is counterclockwise on R=<2cost,3sint> from -pi<=t<=pi
wat the questions are what is the unit tangent the outward normal vector with respect to the region E in terms of t. for the unit tangent i think its <(2cost)/sqrt(13),(3sint)/sqrt(13)>. i don't know if i did that right. i don't know where to start for the normal vector question though. also, i need to use greens thrm to find the amount of work needed to stop it if a particle was to move in the opposite direction.
also wat is given is the work is counterclockwise on R=<2cost,3sint> from -pi<=t<=pi
wat the questions are what is the unit tangent the outward normal vector with respect to the region E in terms of t. for the unit tangent i think its <(2cost)/sqrt(13),(3sint)/sqrt(13)>. i don't know if i did that right. i don't know where to start for the normal vector question though. also, i need to use greens thrm to find the amount of work needed to stop it if a particle was to move in the opposite direction.