Question

The mass and weight of a body:

• A. differ by a factor of 9.8
• B. are identical
• C. are both a direct measure of the inertia of the body
• D. have the same ratio as that of another body placed at that location.

Answer 1

The correct option is D

have the same ratio as that of another body placed at that location.

Explanation of correct option:

Option D:

1. Mass= m
2. Weight= mg
3. The ratio of weight and mass=mgm=g
4. g is constant on all objects at the same location.

Explanation of wrong answers:

Option A:

1. This mass and weight do not differ by a factor of 9.8 because the value of gravitational acceleration equal to 9.8ms-2 is valid only for Earth.

Option B:

1. Mass and gravitational force can not be identical as weight is measured as mass×gravity.

Option C:

1. A property of matter by which it continues to stay in a position of rest or a position of motion unless an external force acts on it is known as Inertia.
2. Inertia is measured by the equation, mass×velocity.
3. Weight does not have a direct measure of inertia, only mass does.

Hence, the correct option is Option D.