How much would a 78 kg man weigh on the moon? Take g = 1.63 m/s².

Question

Question

Answer 1

The correct answer is 127.14 N.

Concept:

Mass: It is defined as the amount of matter it contains.
- It is measured in kg /g /milligram etc.
- It is a scalar quantity and has only magnitude.
- It is not changing due to the position.
- It is measured with Physical balance, beam balance, etc.

Weight: It is defined as a measure of the pull of gravity on an object.
- It is a kind of force and measured in Newton.
- It is measured as weight (W) = mass (M) × gravity (acceleration due to gravity).
- It is a vector quantity as it has magnitude as well as direction.
- It could change according to position, like on the moon or any other planet.
- It is measured with a spring balance.

Calculation:

Given, M = 78 Kg and g = 1.63 m/s²

W = M × g ⇒ 78 × 1.63 = 127.14 Newton

Hence the weight on the moon of the man is 127.14 N

Mistake Points

Do not go blindly with 1/6 of weight terms on the moon.

Here already given the acceleration on moon 1.63 m/s²