# Help in Application of integration.

• May 18th 2009, 06:33 AM
NiCeBoY
Help in Application of integration.
Hello,
Can anyone check if my answer for part (a) is correct and help me out for part (b)?

Below is the question and answers :.

Thanx you very much..
• May 18th 2009, 10:41 AM
Opalg
That looks correct. You could simplify the result a bit, to write it in the form $y=\frac{W}{24EI}(3lx^2-2x^3-l^3)$.

For (b), the maximum deflection occurs when x=0. So just put x=0 in the answer to (a).
• May 18th 2009, 08:30 PM
NiCeBoY
yeah but what to do with the value of E,I and W?
where do i get them please?
thx
• May 18th 2009, 09:38 PM
Isomorphism
Quote:

Originally Posted by NiCeBoY
yeah but what to do with the value of E,I and W?
where do i get them please?
thx

You dont get them :)
You leave them as it is... The answer is supposed to be in terms of them :D
• May 19th 2009, 03:11 AM
NiCeBoY
oh ...
i thought we need to remove W because it is said in the question that we should neglect the weight of the beam.

so the answer for the second part is :
$
y=-\frac{WL^3}{24EI}
$

This is the final answer yeah?

Thanks
• May 19th 2009, 04:54 AM
Isomorphism
Quote:

Originally Posted by NiCeBoY
so the answer for the second part is :
$
y=-\frac{WL^3}{24EI}
$

This is the final answer yeah?

Thanks

Yes! They said "neglect the weight of beam" not the weight of the load ;)
• May 19th 2009, 06:04 AM
NiCeBoY
ah thanks bro.