Question

If ${\mathrm{m}}_{\mathrm{e}}$ is the mass of a body on the surface of the earth and ${\mathrm{m}}_{\mathrm{m}}$ is the mass of the same body on the moon then

• A. ${\mathrm{m}}_{\mathrm{e}}=6{\mathrm{m}}_{\mathrm{m}}$
• B. ${\mathrm{m}}_{\mathrm{e}}<{\mathrm{m}}_{\mathrm{m}}$
• C. ${\mathrm{m}}_{\mathrm{e}}>{\mathrm{m}}_{\mathrm{m}}$
• D. ${\mathrm{m}}_{\mathrm{e}}={\mathrm{m}}_{\mathrm{m}}$

Answer 1

The correct option is D

${\mathrm{m}}_{\mathrm{e}}={\mathrm{m}}_{\mathrm{m}}$

Mass:

1. The mass of an object is a physical fundamental quantity.
2. Mass is a constant quantity in the whole universe irrespective of place or medium, therefore, the mass of an object on earth as well as on the moon will be the same.
3. Thus, if ${\mathrm{m}}_{\mathrm{e}}$ is the mass of a body on the surface of the earth and ${\mathrm{m}}_{\mathrm{m}}$ is the mass of the same body on the moon then ${\mathrm{m}}_{\mathrm{e}}={\mathrm{m}}_{\mathrm{m}}$.

Hence, option (D) is the correct option.