Same Jump

same kid, same push, same bell. new world.

hold to crouch and let go to jump a toy spaceman up to a bell on Earth, the Moon, Jupiter and Saturn, reading each one's pull from its mass and width

The same leg push lifts you higher where gravity is weaker, and a planet's pull at its surface goes as its mass over its width squared. Saturn has 95 times Earth's mass but is 9.4 times as wide, so it pulls about like Earth: 95 ÷ 9.4² is 1.07, and the same push goes 0.94 as high. Gas giants have no ground, so these are cloud-top values; Saturn's fast spin trims its pull at the equator a little more (9.0 m/s² there, NASA's fact sheet).

Concepts: gravity, mass, projectile.

An interactive you play with one thumb, on Wundr.