# Comparing how fast a ball would fall 1 meter on the surface of different celestial bodies [reupload with timing fixed]

(*1*)

Comparing how fast a ball would fall 1 meter on the surface of different celestial bodies [reupload with timing fixed]

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Note: I posted a version of this last week but took it down after a calculation error was pointed out.

This comparison shows what a 1m freefall would look like in realtime on various bodies. I made this by taking this [source video](https://www.youtube.com/watch?v=xEqrvaWPdMI) and adjusting the playback rate according to the planet or moon’s surface gravity strength.

In general (ignoring any atmospheric drag), the time `t` to freefall a height of `s` with acceleration due to gravity `a` can be calculated as `t = sqrt(2*s/a)`. On Earth `a` is about 9.8m/s^2. It’s 26m/s^2 on Jupiter and only 0.61m/s^2 on Pluto.

Check out [this video](https://youtu.be/oYEgdZ3iEKA?t=59) of an astronaut dropping things on the moon to see a real example.

2. drewsiferr says:

I like the idea. The frame rate is, unfortunately, way too low.

3. BranFlakes-n-Raisins says:

Crazy how Saturn and Earth are nearly the same

damn.. trip on a curb in Jupiter n get absolutely merkd

5. TheControlled says:

Is it possible to get a higher frame rate?

6. swagchamp143 says:

Is it just me, or are they also getting released at slightly different times?

7. thebottomofawhale says:

So perfect space destination is cloud city on Saturn?

8. NosyStranger says:

Takes a lot of balls to do this.ðŸ¤”

9. goodenough4govtwork says:

Playback at .25 speed to really see the difference.

10. busterlungs says:

Half of them go down in one frame and the hand isn’t consistent, it jumps a frame too

11. DwarfTheMike says:

So Iâ€™m just going to assume the original video is the earth video. Something tells me this is the right answer.

12. slowkums says:

How is the ‘surface’ of a gas giant defined, anyways?

13. shamrocksmash says:

Guessing that living on mars will have a very permanent affect on human biology and bone density. Still, the first few generations will be able to do so much to get the world set up!

14. MateOfArt says:

Random thought, you could edit all hands to be on normal speed and make just a ball fall in the slow motion to simulate that the person is actually at the other planets

15. bakic0 says:

Upvote for my boy pluto being on there

16. DirtyWormGerms says:

Fake. The video is just slowed down.

17. ThePhysicistDude says:

u/savevideo

18. trevg_123 says:

This really reinforces my childhood idea that I should one day go to Pluto

19. HolyPommeDeTerre says:

For pluto it seems the ball don’t reach ground. Are levitating objects a thing on pluto ?

20. arcalumis says:

It would have been a way better video if the frames werenâ€™t dropped halfway through.

21. dblbblgut says:

So on mars, we would have to increase the height of the basketball hoope proportionately to the difference in gravity?

22. macekm123 says:

u/redditspeedbot 0.5x

23. NyteDragon says:

Pluto is smaller than the moon?

24. apples71 says:

Does this account for any air or gas resistance?

25. OneTimeIDidThatOnce says:

You should have done one for the sun, but I guess then we wouldn’t see it because you’d have to do it at night.

26. bob-belcher69 says:

soo if we go to mars we will unlock no fall damage

u saying on Mars im gonna lose my gains?

28. Tai_Chi420 says:

I’m pretty sure the moon isn’t real

29. dab745 says:

I want to play baseball on Pluto

30. SugestedName says:

Sadly we can’t see balls falling in uranus

31. PR05ECC0 says:

Sports on Mars are going to be interesting.

32. Doghnov says:

Really thought Saturn would be a whole lot faster than earth.

33. Zarathustra772 says:

Why are saturnâ€™s and earthâ€™s so similar?

34. specialdogg says:

No Mercury, Venus, Uranus and Neptune?

35. eIImcxc says:

Movies’ special effects are filmed on Mars. Got it.