application of integration: particle moving along axis

I

insanerp

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Jan 26, 2008
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A problem I am having with the question.
A particle is moved along the x-axis by a force that measures 10/(2 + x)^2 pounds at a point x feet from the origin. Find the work W done in moving the particle from the origin to a distance of 8 ft? work=_____ft*lb

I integrated from 0 to 8 and after solving for W, I got 20.77 to two decimal places, but my answer is incorrect what am I doing wrong?
Can anyone help, Thanks.
Michele
 
Re: application of integration

insanerp said:
A problem I am having with the question.
A particle is moved along the x-axis by a force that measures 10/(2 + x)^2 pounds at a point x feet from the origin. Find the work W done in moving the particle from the origin to a distance of 8 ft? work=_____ft*lb

I integrated from 0 to 8 and after solving for W, I got 20.77 to two decimal places, but my answer is incorrect what am I doing wrong?
Can anyone help, Thanks.
Michele
Click to expand...

I am getting different answer than you.

Please show your work - so that we can figure out what you are doing wrong.
 
I figured it out using the substation rule and got 4 the correct answer, I guess I just needed a good night's sleep.
Thank you anyway.
 
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