The mass of a body on Earth is 100 kg (acceleration due to gravity, ge - 10 m/s2). If acceleration due to gravity on the Moon ge/6, then the mass of the body on the moon is

Mass is an intrinsic property of matter and does not depend on the local gravitational field; only weight (the force) changes with g [1]. Therefore an object that has mass 100 kg on Earth still has mass 100 kg on the Moon. The Moon’s surface gravity is about one‑sixth that of Earth, so while the object’s weight would be reduced by a factor of six, its mass remains unchanged [1]. Hence the correct choice is option 3 (100 kg).

Sources

1. [1] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 5: Exploring Forces > A step further > p. 75
2. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 2: The Solar System > 2.3. The Sun > p. 23