Why Falling Objects Are Not Always Weightless

[michaelkealy]

i noticed this when skydiving. you only feel that sinking feeling for the first few seconds of freefall till you hit that 120mph. it makes sense that only an accelerative force can cancel out an accelerative force. Same way you feel nothing cruising in your car. might aswell not be moving

[sujoy]

You give the answers of those interesting problems almost no one thought of. But when you provide the answers they are amazing😅

[kingsuest]

dude you have no idea how educational you are, i thank you for everything you post your actually amazing.
I’ve been watching you for so long but i feel like i finally needed to say something.
Thanks a lot man!

[climate_sentry_]

This experiment would benefit from analog scales

[MasterBunnyFu]

I think this is more clearly explained via displacement. The scale is measuring the weight of all of the air contained in the column. As soon as the feather displaces some of that air (i.e., is inside the column; *edit:* and is in equilibrium, see replies), the scale is going to measure the net weight (the difference between the weight of the feather and the weight of the air it displaced), regardless of if it is being supported by the air (i.e., falling at terminal velocity), by a string at the top, or by the bottom of the container.

[Deviantial]

Ooh this was cool! Never thought of anything like this before. physics is so interesting!

[a]

A falling object will only experience the fall as weightless as long as it is accelerating, so in the atmosphere where there is drag it will quickly reach the top speed it can get doe to air resistance stopping it from accelerating anymore and not feel weightlessness anymore.

[kricketflyd]

I just watched the vid where you had the fan and balls in your vacuum chamber and it was a lot like when you put flies in the chamber to see if they could fly, both times was concerned about your vacuum pressure and am hoping you will get the TM pump and try reaching the x10-6 range for comparison because so many people are used to that range. Your programs are the best. ❤ Always. 😁

[RodCornholio]

Nice to know whenever I fall off a ladder, the ground feels pain before I do. Take that, evil ground!

[MattSH]

you had me at, "I'll cut the string with a laser".

[bigbossnass]

Where people are getting tipped up is that they don't understand that in order to be weightless you have to be constantly accelerating. Terminal velocity means you are no longer accelerating.

[aniksamiurrahman]

One final experiment was needed to seal the deal for good: to demonstrate that when dropped in vacuum, the feather weighs less the same amount as the steel ball.

[jamesleatherwood]

I could be wrong but as long as you have a container that only has an opening at the top, once the feather enters the tube, the "cup" would weigh the weight of what was "in" the cup, in this case the combined weight of the feather and the air, and since the air has been tared out, just the feather. But since the feather was suspended by external force prior to laser cutting, that weight wouldnt register until the string was cut and the feather was only supported by forced inside the cup.... thats less pussing down on air molecules as opposed the measuring the weight of the closed system.

[jabeavers]

It's like the air hitting you in a subway station when the train it coming. The moving air exerts a force.

[joeltashinian]

Also I did learn something. thank you. I had wondered about just this experiment it's interesting to note that you only see a different weight when there's a change in velocity, not when the velocity is constant, whether up or down fast or slow.

[The_Pro]

I learned so much from this video. Thank you!

[earpiercing]

comparing the air model to the water model and how they function the same also shows how gases are fluids, basically showing how the higher density matter (feather) is displacing the lower density matter (air)

[mike.]

I feel like I missed something you were pointing out at the beginning because you didn't mention it again for the rest of the video. What was the distinction in the closed tube when you used the laser?

[atsumeru]

Man, I'd kill to have a time machine and you as my physics teacher, it's straight up infinitely more educational to have both the theory AND visual.

[robertlavedas]

Hey action lab, I have a question I hope you can clarify.

A Mr Ken Wheeler, states that all sides of a permanent magnet have 2 poles present!
First I know this guy is his own cult of personality, but I did a series of tests, & and low and behold, my tests seemed to show he was correct. But just because a thing seems true, doesn’t mean it is, so I’d love it if you’d test my tests/trails, and see if you agree. “This would explain why a monopole effect can not be made by moving the poles a great distance apart, which we all know doesn’t work.
But if I’m right(and K.wheeler), then a monopole like emergent effect may be possible.

Ken’s claim, that like poles do not repel (at least in the center of the N & S ends, that most believe to only have 1 pole present, he stakes a smaller disk magnet, like poles towards each other, then it sticks to only the center of a monster magnet disk, and does remain, this I have tested with smaller sets of 2 different size disk magnets, and it did as he states, then I tried to place the smaller disk magnet to the larger one, with opposing poles, it will not stick to the center area, and is attracted to the other 50% of the end of said, so I tried it with various powers of magnets from cheap ceramic to N35 & N52, to see if maybe it was sticking to the center because it was a weaker field there.
It absolutely seems to be correct.

And this would also explain why one can not magnetize a pointed cone or pyramid shape permanent magnet directly do it center to its cone without the field shifting to the off center, because both pole can not be present on the cones tip.

As you know a cone or pyramid shape that has the top cut off will not shift, & can be magnetized through its center, & said top point can reach up to 1 Tesla ( unheard of prior in permanent magnets).

I also tried testing hanging metal rods from various parts around and it’s center, it did not seem to be the case of said attachment being due to a weak spot/s in the field!

It does seem that there is both poles present at the n & s end caps, but they are not easily noticed because one covers the other pole underneath!...

Have I just missed something so obvious and fallen prey to a untrue belief? Or is this true?

I can provide diagrams of exactly what I am speaking of if it is confusing!

Thank you, please help, trying to learn the truth.

Some of Mr wheeler’s other absolute stuff I have found to be unprovable, but this I can not seem to debunk...

Now here is where I have a issue, we can magnetize a small straight pin tipped at both ends, but like the cone or pyramid with a point, it may just be shifting its alinement slightly off center from the tips(I suspect but is hard to test)...
Please help