## anonymous 5 years ago Anyone can help w/ a line integral?

1. amistre64

i can try :)

2. amistre64

the suspense is killing me....

3. anonymous

ok, Find the work done by the force field F(x,y)=xi+(y+2)j in moving an object along an arch of the cycloid, r(t)=(t-sin(t))i+(1-cos(t))j, where 0<=t<=2

4. anonymous

sorry it took some time to type

5. anonymous

and it's 0<=t<=2pi sorry

6. amistre64

ahhh..vectors with the i and the j and the stuff...... you tricked me :) sorry, but thats a little outta my league for the moment ;)

7. anonymous

ok, but it's a problem in my line integrals section. yeah, i hate vectors too

8. amistre64

i just havent had the guts to look into vectors; I know they are just arrows pointing in directions....but for some reason I just havent got the nerve to tackle them yet :)

9. anonymous

you took multivariate calculus right? i'm surprised, my book went into vectors from the beginning

10. amistre64

I have tried to read about multivariables, but at the moment I am still trying to grasp inegrating single variables...

11. amistre64

or rather, dependant variables of the singular nature lol

12. anonymous

oh. but you know about line integrals? like integrate (y/x)ds where the curve is x=t^4 and y=t^4?

13. anonymous

wait till you get to surface integrals, yo can someone show me how to do a non homogenous heat equation i skipped lectures and im lost

14. anonymous

oh gosh

15. amistre64

I know of:$\int\limits_{}\sqrt{[f'(x)]^2 + [g'(x)]^2} dx$

16. anonymous

mathfool, i don't think anyone around has the knowlege to answer that