Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing

This Question is Closed

psk981 Group TitleBest ResponseYou've already chosen the best response.0
\[\int\limits_{C}^{} F.T ds \] for a vector field F=x ^{2}iyj
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
from (2,4) to (1.1)
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
dw:1352896610110:dw
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
along the straight line? what is T ?
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
you have to find flow
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
dw:1352897206497:dw
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
how did u get r(t) i know you used the points but why did u pick t for the second set of points
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
the t used is just a variable scalar to stretch the vector to all point along the line from the point used to anchor it to the line
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
so how would i find F. dr/dt where T=dr/dt?
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
i dont recall the flow stuff to clearly, but does this look familiar? \[\frac{dr}{dt}=\frac{dr}{dx}\frac{dx}{dt}+\frac{dr}{dy}\frac{dy}{dt}\]
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
looks like chain rule
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
this is a line integral right?
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
http://tutorial.math.lamar.edu/Classes/CalcIII/LineIntegralsVectorFields.aspx ive always found this to be a rather good read. so im going over it
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
r(t)= <2t, 43t>
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
F=(2t)^2i(43t)j
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
i believe we also need r'
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
how would i get it i know its a derivative would it be r(t)= i3j
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
then thats its; dot F and r' together to get a scalar equation to integrate right?
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
yes its F. dr/dt
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
i am not sure abt the dr/dt part
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
r= <2t, 43t> r'= <(2t)', (43t)'> r'= <1, 3>
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
F=<(2t)^2 ,4+3t> dot r'=< 1 , 3 >  (2t^2)+129t
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
got me ^2 in the wrong side ... :/
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
the line is from t=0 to t=1 giving us\[\int_{0}^{1}4t^2+4t9t+12~dt\]\[\int_{0}^{1}t^25t+8~dt\]
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
do you have an answer key to check with by chance?
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
well, weve followed the simple directions from pauls site; so it should be good ;)
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
these vector fields so confusing
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
indeed they are
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
i have another vector question
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
the Force equation gives us the force at each for each x,y point along the line the lines vector equation gives us the x and y values along the path F(r) is just defining the forces along the path; dotting with r' tho has me a little baffled at an explanation at the moment tho ;)
 2 years ago

psk981 Group TitleBest ResponseYou've already chosen the best response.0
how do i draw a vector field
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
for each lattice point on a graph you draw a little arrow indicating the direction and magnitude of the vector associated with the values of x and y (or whatever reference frame your using) at that point
 2 years ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.