what is the differance between mass and weight

Answer 1

Mass, m, is a fundamental quantity that does not change with motion or location. In metric units it is kilograms. In English units usually slugs.
Weight is the force exerted by the mass due to gravity.
Weight = m g
where g is the local acceleration of gravity. Oh earth surface this is about 9.81 meters/ second^2. On the moon for example it would be about 1/6 as strong so
On the moon the mass is still m
BUT
the weight on the moon is 1/6 the weight on earth.

In general gravitational force, which we call weight, between two objets is
F = G M m / d^2
G is universal gravity constant
d is distance between m and M
on earth surface M is mass of earth if m is your mass and d is earth radius R
so
W = m * (G M/r^2)
so around earth surface where d = R
G M/r^2 = about 9.81 m/s^2
of course as you can see if you go way up high or dig way down low, W will change, but m remains mass .
Weight = (G M/

Answer 2

weight refers to the force gravity applies to an object. A simple mass definition for kids is: mass reflects the amount of matter

Answer 3

thanks