Brian Butterworth wrote:
lb-force is (was) an imperial measure of force, so they're perhaps
half-right.
Newtons are
m·kg·s^-2
^Which is distance x mass / time squared , lbs is just mass, unless
"of force" is a magical way of saying distance / time squared?
No, in imperial measurements the term pound can be used as a unit of
force or mass, they are different measurements, and their meaning is
derived from context.
Sometimes pounds-force and pounds-mass if both are being discussed
simultaneously. If you're talking about force, the imperial unit of
mass becomes the slug.
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*Simon Thompson MEng MIET MIEEE*
Research Engineer (Electronics)
PRINCE2^TM Registered Practitioner
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