this post was submitted on 15 Oct 2023
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[–] [email protected] 90 points 1 year ago (2 children)
[–] [email protected] 35 points 1 year ago (1 children)
[–] [email protected] 25 points 1 year ago (1 children)
[–] [email protected] 8 points 1 year ago (1 children)

Sonic can take the Gs. This is only a problem for humans.

[–] [email protected] 2 points 1 year ago

More loops necessary, then.

[–] [email protected] 56 points 1 year ago* (last edited 1 year ago) (1 children)

I have one of those giant hamster wheels for our cat. If you use the laser pointer and get her to chase it on the cat-wheel, when she tries to stop when at full speed, she goes all the way around and the wheel spits her out. Funny as hell. Then she goes back for more. Cat loves the wheel.

[–] [email protected] 20 points 1 year ago (1 children)

We’re going to need a video of this now. Pay the cat tax.

[–] [email protected] 8 points 1 year ago

@TheBenCommandments @jrwperformance

Yeaaahhh a video. Pay the tax man. Hand over the video.

[–] [email protected] 35 points 1 year ago (3 children)

The cat is moving in a circle, so it has a centripetal acceleration and a centripetal force. At the apex of the loop, that force is the sum of gravity, and resistance from the track. The track force is greater than or equal to zero, so acceleration due to gravity is less than or equal to the total centripetal acceleration.

g ≀ vΒ²/r
So,
r ≀ vΒ²/g

Taking top speed of a cat as 8.278m/s (from Wolfram Alpha), and g on earth as 9.81m/sΒ², this gives us r ≀ 6.99m. So long as the cat can maintain its top speed all around the loop, it can successfully do a loop of up to 14 meters diameter. This is a lot bigger than I expected, to the extent that I suspect some flaw in my reasoning.

[–] [email protected] 20 points 1 year ago (3 children)

The cat won't be able to maintain its top speed because of deceleration from lack of friction

[–] [email protected] 15 points 1 year ago

Claws homie

[–] [email protected] 8 points 1 year ago

Good point. It has zero contact force at the apex, so 14m is an upper bound on possible cat-loops.

[–] [email protected] 4 points 1 year ago

True. But if top speed allows for 14 meters, surely a 1.5 to 2 m loop should be possible (especially given a cat's incredible reflexes and control given a lack of friction or even freefall). I'd guess that a cat, given enough motivation, could keep running under the little friction provided by the centripetal force for a few hundred milliseconds - likely long enough to complete a 1m loop, maybe even 2, given sufficient space for a top-speed run before entering...

[–] [email protected] 2 points 1 year ago

I get the same math... Seems fucky but... This is assuming the sum of centripetal acceleration and gravity at the peak of the loop is zero. It may be physically possible for a cat to learn to manage a loop with such velocity but I imagine a cat wouldn't be able to maintain a stride through a zero-g portion of the loop the first time it tried it.

So, instead let's throw an assumption that the cat must maintain at minimum sum of -1g at the maxima of the loop. That may be badly phrased, assuming the cat must have at minimum a net force of at least one g between it's paws and the surface of the loop it was currently using to accelerate...

3.5 meters = 11.5 feet

Radius, so still a freaking 7 meter diameter loop feels incredible...

[–] [email protected] 34 points 1 year ago (2 children)

Jpeg compression so bad I read that as "fake mouse on rat"

[–] [email protected] 4 points 1 year ago

Oh! So did I

[–] [email protected] 2 points 1 year ago

i was on rat once in my life, worst trip of my life, never again

[–] [email protected] 11 points 1 year ago

It would probably make too much noise, so the cat would stare at it from a distance.

[–] [email protected] 8 points 1 year ago

Yes, provided the chase didn't stop a cat should easily do it.

[–] [email protected] 7 points 1 year ago

I dunno. Build one and try it with your cat and let us know the results.

[–] [email protected] 7 points 1 year ago

Cat expert here. Yes a cat could.

[–] [email protected] 6 points 1 year ago* (last edited 1 year ago)

I mean a hedgehog could do it walking slowly, I don't see why I cat couldn't do it running. Context

[–] [email protected] 5 points 1 year ago

Cat kinda lookin like Pikachu

[–] [email protected] 5 points 1 year ago

If I'm dangling her Bug-Onna-Leash and my adolescent cat comes running, and I lift up the bug, she'll sometimes do a loopdeloop leap without any track at all, either swatting the bug or grabbing him in her teeth and running off with him. This would be a cakewalk for her.

There are cats who can't jump or run fast or climb, we love them anyway. But to test your theory you need to get the cat to WANT to do it. "What's in it for me?" is their guiding principle.

So it's all going to depend on motivation; the mouse needs to be just bite sized, catnippy, and have a little bell or rattle sewn inside it. You should pull it in an enticingly twitchy way. Treats may also be needed.

[–] [email protected] 3 points 1 year ago

If the cat was chasing Tony Hawk instead of a mouse, yes.

[–] [email protected] 3 points 1 year ago

i think the cat would wait at the end of the loop for the mouse

[–] [email protected] 3 points 1 year ago

If the loop is carpeted, she sure could.

[–] [email protected] 3 points 1 year ago

Build it, record it, post it, and win all of the internet points!

[–] [email protected] 2 points 1 year ago

My cat does that even without the walkway.

[–] [email protected] 2 points 1 year ago

At least 3 of my cats could do that, even at low speeds.

[–] [email protected] 1 points 1 year ago

Depends how fat the cat is

[–] [email protected] 1 points 1 year ago

"You were so preoccupied with whether or not the cat could, that you didn't stop to think if he would."

[–] [email protected] 1 points 1 year ago

Depends on how fast you toss it in there. LOL.

[–] [email protected] 1 points 1 year ago

If the track is made of wood, yes.

[–] [email protected] 1 points 1 year ago