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Unread 16-01-2008, 18:00
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Re: Need number help buddies

Quote:
Originally Posted by AdamC View Post
First of all, how much PSI are you running to it? I'm assuming 60psi, so I'll calculate it as such.
60*.75*3.14 = 141.372
You will produce approximately 141.372 Newtons of force. Using some kinematics equations, you can find the speed.
Uh, it looks to me like you multiplied pressure in pounds per square inch by piston circumference in inches, and reported the result as force in Newtons. It doesn't work that way.

The correct calculation is 60 lbf/in^2 x pi()*(0.75^2)/4 in^2 = 26.5 lbf.

That force could also be expressed as 118 Newtons.
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Richard Wallace

Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
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since 2003

I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)

Last edited by Richard Wallace : 16-01-2008 at 19:40. Reason: units