Re: If gravity pulls everything the same, why don't things with different masses weigh the same?

When you measure the weight of an object you are actually measuring the 
force exerted by the object onto your weighing scales.

the force exerted by the object is calculated from:
F = Mg
M is the mass of your object
g is the acceleration of the object under gravity
(Look up Newton's 2nd Law of Motion)

the acceleration 'g' is the same for everything on the earth 
(9.81 metres per second)

but the force is different depending on the mass of your object.
the bigger the mass, the bigger the force...
so different masses weigh different amounts