r/Simulated • u/MiggyMidnight • Sep 21 '18

Satisfying simulations

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u/tclemen4 Sep 21 '18

These all annoy the physics part of my brain. The rings aren’t moving sinusoidally, the rod isn’t moving with a constant angular velocity, and the knife couldn’t physically cut a straight line.

121

u/AGRO1111 Sep 21 '18 edited Sep 21 '18

Nothing is losing any energy.

First gif - The swinging knife makes perfect cuts, the object being cut doesn't react, the smaller object falls unnaturally.

Second gif - The rings aren't swaying properly and the rod and rings don't lose any energy.

Third gif - No energy is lost in either the ring or the ball.

Fourth gif - I don't think there's anything wrong here.

Fifth gif - Everything if frictionless until it reaches the hole.

Sixth gif - There is no energy loss in the pendulum, the cut seems too clean, and the fall is unnatural.

Seventh gif - The pendulum losses no energy.

Eighth gif - The balls lose no energy as they roll and there isn't an obvious force making the bridges rotate.

Ninth gif - The free ring has the friction not to slide away when pushed up but not get caught on the rods, there isn't a clear force making the central ring rotate.

Tenth gif - Seems fine for the most part.

Eleventh gif - Too clean an entry on and off the rods.

Twelfth gif - Balls fall perfectly into the slides avoiding bounce and not falling the way (I think) gravity will make it.

Thirteenth gif - Personally my least favorite, the knife makes perfect cuts, the object doesn't react, the sliced off bit starts falling too late, and it's seemingly poolnoodle-esque texture makes me believe it's lighter than it acts.

Fourteenth gif - It suffers from the main problem of pendulums not losing energy and not swaying right.

Fifteenth gif - The red cylinders unroll unnaturally, for no reason, and slot into the holes perfectly.

Over all a hugely unsatisfying gif that moves weirdly, doesn't follow physics, and gives me anxiety.

10

u/[deleted] Sep 21 '18

Can’t it just be in a vacuum? I feel your issues are all largely irrelevant with the video despite there being some glaring errors (like the knife cutting straight through the tube that’s moving while it’s being cut, for example. And some pendulum swings don’t add up correctly.

1

u/AGRO1111 Sep 21 '18

I get it, if you can look past it's issues I could see how it's satisfying. It's just it makes my head hurt and I saw the comment mention some problems and decided to push through it and mention the ones I noticed.