system
Given the following post, respond as if you're commenting on Reddit:
human
Would it be possible to jump off of Ganymede?

Friends were playing the CCG "Wars" and debating whether the dinosaur creatures could simply leap  off of Ganymede rather than needing a spaceship. I am not smart enough to answer this query I hope that reddit can help.
gpt
Gravity on Ganymede is about 15% of that on Earth, only a little less than the Moon.  Escape velocity is 2,741 meters per second, so, like the Moon, you'd need a small rocket to escape.

Deimos, Mars' smallest moon only has surface gravity of 0.003 m/s^2 (as opposed to Earth's 9.81), which gives it an escape velocity of 5.5 meters per second, or about 20 km/h.  Kameson Konz recorded a 46" vertical jump at an NFL pro day, which means he left the ground with a velocity of about 4.78 m/s.  Not quite enough to escape Deimos, but enough to have him in a suborbital freefall for 53 minutes.