Mass of a particular amount of substance
- 1. is the amount of matter present in it.
- 2. does not vary from place to place.
- 3. changes with change in gravitational force.
Select the correct answer using the code given below :
1, 2 and 3
1 and 2 only
2 and 3 only
1 only
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC NDA-1 – 2016
1. is the amount of matter present in it: This is the fundamental definition of mass. Mass is a measure of the inertia of an object, which is directly related to the quantity of matter it contains. This statement is true.
2. does not vary from place to place: Mass is an intrinsic property of an object. Unlike weight, which depends on the gravitational acceleration, mass remains constant regardless of the location (e.g., on Earth, the Moon, or in space). This statement is true.
3. changes with change in gravitational force: This statement is false. Weight (W) changes with gravitational force (g) according to the formula W = m * g. As gravity changes, weight changes, but mass (m) itself remains constant. For example, an object weighs less on the Moon than on Earth because the Moon’s gravity is weaker, but its mass is the same in both locations.