May 9th, 2015, 04:35 PM  #1 
Member Joined: Apr 2014 From: australia Posts: 68 Thanks: 32  integral evaluation
Hello, Find the work done by the force field F(x, y, z) = (–x^4 y^2 i) – (4 j) + (ln(x^4 – y^2) k) acting on a charged electric particle moving along the path given by the equation r(t) = (2 cos t i) + (2 sin t j) + (4 k); where the parameter t varies from pi /4 to 7pi /4. thanks in advance I have had a go at it and after evaluating the integral $\displaystyle I=int(F.dr)$ I get an answer = 8.sqrt(2) thanks in advance 
May 9th, 2015, 05:03 PM  #2  
Math Team Joined: May 2013 From: The Astral plane Posts: 1,691 Thanks: 672 Math Focus: Wibbly wobbly timeywimey stuff.  Quote:
Would you care to share your solution so others might see it? Dan  
May 9th, 2015, 05:15 PM  #3  
Senior Member Joined: Aug 2014 From: United States Posts: 136 Thanks: 21 Math Focus: Learning  Quote:
 
May 9th, 2015, 05:24 PM  #4 
Member Joined: Apr 2014 From: australia Posts: 68 Thanks: 32  

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