Mass is the amount of matter in an object and never changes. Weight is the pull of gravity on that mass, weight equals mass times gravitational field strength, so it changes from world to world. The spring scale on the left reads weight and swings as you travel. The beam balance on the right compares masses, so it stays level everywhere. Choose a world and a mass to hit the target weight.
MissionMake the spring scale read 50 N. Pick a world and a mass.Round 1Streak 0Best 0
Travel to the Moon. The beam balance will:
mass, the same everywhere5.0 kg
gravitational field strength g9.8 N/kg
weight W = m g49.0 N
W = 5.0 × 9.8 = 49.0 N. Change world, change g, change weight, but never the mass.