Question

what is the difference between mass and weight of an object.will the mass and weight of an object on the earth we same as their values on mars?why?

Answer 1

Mass" and "Weight." ... The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. The pull of gravity on the earth gives an object a downward acceleration of about 9.8 m/s2.
Thus it is the product of the object's mass and the acceleration produced due to gravitational interaction between the object and the surface. Since at earth, this acceleration is not 1 (it is approximated to 9.8 m/s^2),mass and weight of an object cannot be the same on the Earth.
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Answer 2

mass the actual measurement of composition of a body but a weight rather measures the force applied by or on the body at that particular place.
w=mg.
mass is same and constant everywhere in the universe unless u travel with the speed of light.
weight keeps on changing from place to place depending upon the gravity at that place.
so mass is same and weight is different