Question

The mass of a body:
A. Is slightly different at different places on earth.
B. Is independent of the free-fall acceleration.
C. Is the same for all bodies of the same volume.
D. Can be measured most accurately on a spring scale.

Answer 1

Hint:Mass of a body is the quality of its matter and is independent of its position, its acceleration and free fall acceleration.

Complete step by step answer:
We have to answer on what parameters the mass of a body depends.
Now, we know the mass of a body is its inertia or resistance to change of motion. We can say mass is both a property of the physical body and a measure of its resistance to acceleration when some force is applied.
Now, we can say mass of a body is the quality of its matter and is independent of its position, its acceleration and free fall acceleration. As we know wherever we go the mass of our body never changes.
Mass of any body is given by $m=\rho \times v$ , where $\rho$ is the density of the body and v is the volume.
So, we know that if density varies then mass for the same volume will be different.
It cannot be measured by spring balance because it measures the weight of a body which is different at different places.
So, if we see the above option the best possible answer could be option B, as the mass of a body is independent of the free – fall acceleration.
And the rest of the options are not correct as the mass remains the same at every place on earth. Also, if the density changes then the mass will not be the same for all bodies of the same volume. And the last option is also wrong as the spring scale measures the weight not the mass.

Note – Whenever such types of questions appear, then first try to know what actually mass means. As mentioned in the solution, mass of a body is its inertia. And then checking each option whether they are correct or not. So, we can see only the B option is correct but the other options are not correct.