Mass is the fundamental attribute of any physical body.
All the objects have a matter inside them and the measurement of the matter is the mass.
The total mass of the system is assumed to be constant. This means that the mass remains unaffected by the gravitational field strength, regardless of the location, the object or person is in.
Mass has a magnitude that is usually measured in kilogram and gram. Therefore, it is a scalar quantity.
We are on earth and we measure things on earth with earth's gravity.
If your weight is 70 kg which means you weigh 70 kg and the scale would read it 70kg or 154 lbs.
Mass is defined as the measure of the matter inside a body.
In physics, mass is a quantitative measurement of inertia.
Let’s understand the concept of mass by understanding Newton's second law.
For example, a body of mass, ‘m’ is moving with an acceleration ‘a.’ The force, ‘F’ is applied to the body given by,
F = m . a
Here, mass is a measure of its resistance to acceleration when a force is applied on to the body.
Therefore, greater the mass of a body, the minimum change produced by an applied force.
Mass is referred to as the amount of matter contained in a body.
For example, a human body has bones, muscles, tissues, RBC, WBC. As combined, they form a body’s mass.
A person or object may be weightless on the moon because of lack of gravity while he maintains the same mass at all places without considering his location.