Masses of several objects were measured on the Earth as well as on the Moon using the same two-pan balance. The graph of the measurements obtained on the two sites would appear as

Correct option is C

Given:

• Masses are measured using the same two-pan balance on Earth and the Moon.
• The mass of an object is invariant — it does not depend on location (Earth or Moon).
• A two-pan balance compares the mass of two objects by comparing their weights under the same gravity — so it reads mass, not weight.

Solution:

• On the Moon, though gravity is weaker, a two-pan balance still works correctly because both pans are affected equally by gravity.
• Therefore, the measured mass on Earth and on the Moon should be the same for all objects.
• So, the graph should show a straight line through the origin with a slope of 1 (equal measurements on both Earth and Moon).

• This matches Graph C in the image.

​Correct Answer: Option C