Question

If your mass is 50 kg what is your mass on the moon?

Answer 1

An old trick question set by a fiendish physics prof...

Explanation:

Mass is invariant. A mass of `50*kg` on Earth is STILL a mass of `50*kg` on the Moon, and still a mass of `50*kg` on Jupiter, and still a mass of `50*kg` on the dark side of the planet Coosbane.

However, WEIGHT does vary given the gravitational well. A mass of `50*kg` has a WEIGHT of `50*kgxx9.81*N*kg^-1=490.5*N` on the earth, but a weight of `50*kgxx1.622*N*kg^-1=81.1*N` on the moon......

Answer 2

`50` kilograms

Explanation:

Mass never changes, and is constant everywhere. The weight is what changes. If you weigh `50 \ "kg"` on Earth, you'll weigh `50 \ "kg"` everywhere else in the universe. That's because the amount of matter in you cannot change.