f = 2xy in the x dir, (x^2 - z^2) in the y dir, -3xz^2 in the z dir.(adsbygoogle = window.adsbygoogle || []).push({});

particle travles from (0,0,0) to (2,1,3)

im supposed to find the line integral from (0,0,0) to (2,1,3).

if i make z = 3/2 x and y = 1/2 x and substitute those into the integral of F dot dl i end up with an answer of -27.66667. the way im doing it makes sense from the things ive seen on the net. but the book gives an answer of -39.5. ??

also, ive got another problem, my electro-magnetics prof didnt get a chance to do any examples on this stuff. D = 2 Ro z^2 in the Ro dir, and Ro cos^2 theta in the z dir.

find closed surface integral of D dot Ds.

0<Ro<5

-1<z<1

0<theta<2pi

ive got no idea on this one. is it basically the same thing as a line integral or do i do something different?

**Physics Forums - The Fusion of Science and Community**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Need help with some vector calculus problems

Loading...

Similar Threads - Need help vector | Date |
---|---|

B Need some help with understanding linear approximations | Feb 17, 2018 |

I Need help understanding this step in simplifying a limit equation | Apr 21, 2017 |

I Help needed; problematic integral | Feb 6, 2017 |

Vector Analysis: Help needed | Jul 3, 2012 |

**Physics Forums - The Fusion of Science and Community**