Brutkey

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3181. Jumping Frog Radius

title text: Earth's r_jf is approximately 1.5 light-days, leading to general relativity's successful prediction that all the frogs in the Solar System should be found collected on the surface of the Earth.

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Single panel comic.

A small diagram showing a circle with a radius r subscript j f. On the outside of the circle there is a tiny from hopping from one point to another in an arc. It says "ribbit" and makes a "plop" noise when it lands.

Next to the diagram is an equation to calculate r subscript j f , which is 2 * G * M divided by (4.5 meters/second) squared.

Lower caption: More practically useful than the Schwarzschild radius, the Jumping Frog radius is the radius at which an object's gravitational pull is so strong that even a champion jumping frog can't escape.