[SOLVED] Convert Pounds per Inch^2 To Newtons per Meter

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February 24th 2009, 03:21 PM
Jbuckham

[SOLVED] Convert Pounds per Inch^2 To Newtons per Meter

Ok the Question Reads:
Convert 28lb/in^2 to Newtons/m^2. (1lb = 0.2248 Newtons, 1in = 2.540cm)

This is my incorrect attempt at working it out

=28*0.2248*254^2
=406089.5104

The Correct answer (obtained from a online conversion calculator) is
193053.2038

How do I arrive at that answer
February 24th 2009, 03:25 PM
arpitagarwal82

correct answer is

$(28 * .2248 )/ (1 * .0254)^2$
since 1 inch = .0254 m
February 24th 2009, 03:32 PM
skeeter

Quote:

Originally Posted by Jbuckham

Ok the Question Reads:
Convert 28lb/in^2 to Newtons/m^2. (1lb = 0.2248 Newtons, 1in = 2.540cm)

you got your conversion factor backwards ...

1 pound force = 4.44822162 newtons

1 newton = 0.224808943 pounds force
February 24th 2009, 03:34 PM
Jbuckham

Quote:

Originally Posted by arpitagarwal82

correct answer is

$(28 * .2248 )/ (1 * .0254)^2$
since 1 inch = .0254 m

Of COURSE I was converting the cms to meters wrong!
but
[/tex](28 * .2248 )/(1 * .0254)^2
=6.2944/0.00064516
=9756.33513
[/tex]
Which accoding to the online conversion calculator is wrong

Quote:

Originally Posted by skeeter

you got your conversion factor backwards ...

1 pound force = 4.44822162 newtons

1 newton = 0.224808943 pounds force

Not me mate the blinkin' lecturer! (Headbang)
February 24th 2009, 03:42 PM
arpitagarwal82

You got those factors wrong. So if we consider correct factors, answer will be
$28 * 4.44822162/ (.0254)^2$

which is 193053 approx.

My mistake. I should have cross checked the factors provided by you before answering.