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Poll about physics & parlor magic

Elementary.

The secret Jooish cabal dispatched a cadre of blood drinking lizards to intercept a holographic aircraft. Along the way, the lizards' hatred of Atlantis warped space-time.
 
give YOUR explanation of what just happened.

I would suspect that somebody was given a placebo instead of their daily dose of risperdal.
 
404 - Poll not found.
 
Please see

Faster than gravity - YouTube

and then give YOUR explanation of what just happened.

Can U dig it?

There could be a number of explanations.

In the first drop, there's something on the end of the stick touching the ground. It could be exerting force on it to push it down faster than gravity can pull it.

The ball could not be what it looks like (i.e. a chromed ping pong ball rather than a steel ball bearing) which means air resistance would slow it down more than the stick.

In the later tests with the magnet it could simply be an illusion and the magnets aren't actually at the same height. Or the could have not turned the magnet holding the bar up off completely.
 
****ing magnets..... how do they work?
 
Well, I did notice that on the first two the ball did fall strait down and did not go to the side. Also since we had bar with one end on the ground and thus was not a free falling object and would have experienced torque but I do not know enough about the physics to make a determination on how that would affect the instantaneous velocity of the falling end of the bar.
 
First experiment is obvious, the ball drops straight down and the bucket lines up when the wood post falls.

2 objects with the same mass will reach the ground at the same time when dropped at the same time. It's obvious a metal pole which already has one end touching the ground will not fall at the same rate of speed since there is resistance. Plain and simple it's a flawed experiment. Drop the whole pole, not one end, and you will see them both reach the ground at the same time.
 
The ball in the first two is not that heavy...it's falling into an electrical tape roll, and doesn't budge it in the first shot, and actually lands on the side of the roll on the second without even flipping...plus, the board could easily be heavier than a standard board via weights or what not. On the last drop, the pole is on end, and not the least of which, drop the items from more than 6 inches off the ground.



This doesn't even make it parlor trick level.
 
This isn't a trick, this is basic rigid body dynamics. The ball is free falling. The board is not free falling. Hence, different motions.

For small angles, the CG of the board (so about halfway up) will fall at nearly free fall speeds (a bit slower because of rotational inertia) and the tip of the board will move at effectively twice that speed. For larger angles, the CG of the board will descend at a noticeably slower rate because only a portion of the gravity force vector (according to the sine of the angle) contributes to rotational acceleration.
 
I know the answer. I suck at physics though, so I did need a bit of help. ;)

The ball starts higher than the cup. They're falling at the same speed. Knowing that, watch it again.
 
First experiment is obvious, the ball drops straight down and the bucket lines up when the wood post falls.

2 objects with the same mass will reach the ground at the same time when dropped at the same time. It's obvious a metal pole which already has one end touching the ground will not fall at the same rate of speed since there is resistance. Plain and simple it's a flawed experiment. Drop the whole pole, not one end, and you will see them both reach the ground at the same time.

Exactly this.

Not very complicated - though neat to see it in slow mo
 
Exactly this.

Not very complicated - though neat to see it in slow mo

It is cool to see it in slow motion. I remember a long time ago standing on a bridge with a friend and doing the gravity experiment with various size rocks. They always hit the ground at the same time.
 
This isn't a trick, this is basic rigid body dynamics. The ball is free falling. The board is not free falling. Hence, different motions.

For small angles, the CG of the board (so about halfway up) will fall at nearly free fall speeds (a bit slower because of rotational inertia) and the tip of the board will move at effectively twice that speed. For larger angles, the CG of the board will descend at a noticeably slower rate because only a portion of the gravity force vector (according to the sine of the angle) contributes to rotational acceleration.

D00d, do you really believe this stuff
or are you just putting me on?

what?
 
D00d, do you really believe this stuff
or are you just putting me on?

what?

Do I really believe basic physics and rigid body dynamics? Yes. Yes I do.
 
Do I really believe basic physics and rigid body dynamics? Yes. Yes I do.

Z0, other physics question for you,
check out the videos of WTC7 "collapsing" and note that there is a period of 2.25 sec
where the skyscraper descends at 9.8 m/s^2 ..... what do you make of that ?

Just curious ......
 
Z0, other physics question for you,
check out the videos of WTC7 "collapsing" and note that there is a period of 2.25 sec
where the skyscraper descends at 9.8 m/s^2 ..... what do you make of that ?

Just curious ......


The same thing I make of all the observations and evidence surround the WTC collapse - that the WTC collapsed in accordance with our understanding of physics and mechanics.
 
The same thing I make of all the observations and evidence surround the WTC collapse - that the WTC collapsed in accordance with our understanding of physics and mechanics.

in other words .... with or without explosives to make it happen?
 
I solved that problem in Math Methods. Geometry, center of mass, torque, and inertia.

Satisfy my curiosity .... your solution is:(?)
 
****ing magnets..... how do they work?

If you find out, would you let me know?

I've always wanted to be a **** magnet.
 
This isn't a trick, this is basic rigid body dynamics. The ball is free falling. The board is not free falling. Hence, different motions.
Sorry, but this is incorrect.

Look at the video again.

Measure the height of the ball from the table.

Measure the height of the cup from the table.

Observe how the cup and the ball fall at the same rate.
 
Sorry, but this is incorrect.

Look at the video again.

Measure the height of the ball from the table.

Measure the height of the cup from the table.

Observe how the cup and the ball fall at the same rate.

No you watch the video again. They absolutely do not fall at the same rate.
 
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