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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Re: mmmmm posted by Fatcobra on December 12, 2004 at 13:08:56:
"if I stand on one leg, now I'm heavier (and far as the ground is concerned)" - no! You are no heavier at all. The pressure exerted at contact has increased because your weight is now spread over a smaller area and pressure = mass divided by area. The weight remains constant in your example and only the area changes, leading to a change in pressure."weight in combo with size makeup mass". Once again, No! Weight isn't "force relative to gravity" as you said but rather the force a mass exerts under gravity. In other words, weight is what a given mass 'measures' under a particular gravity. Gravity on the moon is less than on earth, so I would weigh less - ie exert a lesser downward force under gravity - than on Earth, even though my mass remains constant. For all practical purposes here on Earth where our standards are based, the terms 'mass' and 'weight' can be used relatively interchangeably, but they aren't the same.
What weight in combination with size, at least volume, define is density.
David Aiken
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Follow Ups
- Re: mmmmm - David Aiken 14:40:23 12/12/04 (2)
- Re: mmmmm - Fatcobra 14:48:17 12/12/04 (1)
- where did you study physics? - dave c 14:57:45 12/12/04 (1)
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