Question

Find the weight of a 80 kg man on the surface of the moon? What should be his mass on the moon and the earth? (ge =9.8 m/s2, gm =1.63 m/s2 )

Answer 1

If a man's mass is 80 kg, then ...

-- He weighs 258 newtons on Mars.

-- He weighs 785 newtons (about 176.4 pounds) on Earth.

-- He weighs 130 newtons on the Moon.

-- He weighs different amounts in other different places.

His mass doesn't change.  It's 80 kg no matter where he goes.