gravitational
field. Mass and weight are related as shown in following
Equation:

Note that gc
has the same numerical
value as the acceleration of gravity at sea level, but is
notthe acceleration
of gravity. Rather, it is a dimensional constant employed
to facilitate the use of
Newton’s Second Law of Motion with the
English system of units.
The weight of a body is a force produced
when the mass of the body is accelerated by agravitational
acceleration. The mass of a certain body will remain
constant even if thegravitational
acceleration acting upon that body changes.