dslreports logo
 
    All Forums Hot Topics Gallery
spc
uniqs
30

BonezX
Basement Dweller
Premium Member
join:2004-04-13
Canada

BonezX to cowboyro

Premium Member

to cowboyro

Re: Weights and measures

said by cowboyro:

said by DataRiker:

Since the term pound is unqualified it can refer to a mass or a force.

The term pound denotes a mass (when we are talking about "weights"). The pound-force term denotes the gravitational force exerted by a 1lb mass on Earth.

LB is a measurement of force(weight is called the normal force of an object fyi), the imperial measurement of mass is the slug.

cowboyro
Premium Member
join:2000-10-11
CT

cowboyro

Premium Member

said by BonezX:

said by cowboyro:

said by DataRiker:

Since the term pound is unqualified it can refer to a mass or a force.

The term pound denotes a mass (when we are talking about "weights"). The pound-force term denotes the gravitational force exerted by a 1lb mass on Earth.

LB is a measurement of force(weight is called the normal force of an object fyi), the imperial measurement of mass is the slug.

According to NIST it's officially defined as a unit of mass. What some people use it as has no bearing over the official definition.

BonezX
Basement Dweller
Premium Member
join:2004-04-13
Canada

BonezX

Premium Member

said by cowboyro:

According to NIST it's officially defined as a unit of mass. What some people use it as has no bearing over the official definition.

»en.wikipedia.org/wiki/Sl ··· 8mass%29
»en.wikipedia.org/wiki/No ··· al_force

might want to also look outside the united states of stuck in the past, if you did calculations in the scientific community, or about ~90% of the countries in the world in lb you would be laughed at.

DataRiker
Premium Member
join:2002-05-19
00000

3 edits

DataRiker to cowboyro

Premium Member

to cowboyro
said by cowboyro:

According to NIST it's officially defined as a unit of mass. What some people use it as has no bearing over the official definition.

This is a rather silly point since force is defined using mass.

When you understand your circular reasoning get back to me.

cowboyro
Premium Member
join:2000-10-11
CT

cowboyro to BonezX

Premium Member

to BonezX
said by BonezX:

said by cowboyro:

According to NIST it's officially defined as a unit of mass. What some people use it as has no bearing over the official definition.

»en.wikipedia.org/wiki/Sl ··· 8mass%29
»en.wikipedia.org/wiki/No ··· al_force

might want to also look outside the united states of stuck in the past, if you did calculations in the scientific community, or about ~90% of the countries in the world in lb you would be laughed at.

The pound is the official unit for mass. Not force, mass.
The slug is a derived unit that makes the 1:1 translation between units of time, length and force so that F=m*a

DataRiker
Premium Member
join:2002-05-19
00000

4 edits

DataRiker

Premium Member

Force is defined using mass.

If you use pound in science, you will be immediately asked to clarify if you mean force or mass.