re: energy producing experiments

[sm0ky2]

Then what is that loud kerklunk as each of the balls
Smack the side of the pvc in your video?

[sm0ky2]

The string gets shorter and shorter as the ball approaches
Ultimately the arc formed by the string becomes smaller than
the arc of the cylinder. Follow the final trajectory when r=0
And you can see that the ball is moving straight (linear)
Towards the axis. It strikes the pvc at a 90-degree vector.
Notice how it bounces straight away from the surface?

If it is truly moving at 1.2m/s ( I cannot verify that)
steel vs pvc is partially inelastic collision. I could prove to you
exactly how much of the impact momentum gets converted to
heat. It's not an amount that is significant, but it was the first
identifiable loss. After further review, I have a few others to
discuss.
What I see from slowing the video down is the ball in front
Closest to the screen hits first, the pvc moves towards the
Other ball, shortening the time it would have hit by a fraction
Of a second, and the second ball strikes a moment later,
Causing the pvc to stop moving in that direction
a portion of the rotational momentum carries back to the pvc
certainly not 100% of it
However, the forward and downward momentum of the test device
Appear to be the dominant momentii throughout the video.
The input from your hand was much more than the returning balls
Put back as rotational momentum to the pvc.


I don't see energy being created here.
I see energy dissipated as heat, sound, physical vibrations
And reversal of angular velocity by momentum exchange.
All of these things are minus energy

[Delburt Phend]

It is important to note that the quantity of momentum at the end is equal to the quantity of momentum at the beginning. This means that the quantity of momentum is the same at every point in between the beginning to the end. The total quantity of momentum will not change; without the application of outside force.  The cylinder moves 20 mm in four frames at the beginning; in the middle; and at the end. But these three points are not where the energy is at a high point. The energy is at a high point when the cylinder is stopped.

When you search yo-yo despin you will get about a dozen sites that throw the tethered spheres off when the cylinder (disk, satellite) is stopped. NASA predicts that these thrown spheres have the same energy of the original spinning energy; this is not true.  The spheres have the same momentum as the original spinning momentum. These dozen experimenters are conserving momentum not energy.

You can't grab momentum out of the blue; and you can't lose it. There is no 95% heat loss for momentum; it remains the same. The final momentum is the same because the spheres have the same momentum when they have all the motion. And in this experiment; when the spheres have all the motion they have a 450% increase over the original energy.

In most of the dozen sites; the experimenters are producing much more than 450% increases in energy because the mass ratio of system/spheres is larger.

The double stop experiment proves that the motion can go back and forth. Energy allegedly loses heat and therefore cannot go back and forth.

When a 399 kilogram block (at rest) is struck by a 1 kilogram bullet moving 400 m/sec the block will accelerate to 1 m/sec.

When a 399 kilogram rim (with bearing) mass wheel (at rest) is struck tangent by a one kilogram bullet moving 400 m/sec; the rim will accelerate to 1 m/sec.

If we wrap a string around a 399 kilogram rim at rest; and place the bullet moving 400 m/sec on the end of the string and moving perpendicular to the string; would we then accelerate the rim to 20 m/sec or still just 1 m/sec? 

[sm0ky2]

I think you are missing the point
While total momentum is conserved, true
This momentum has magnitudes and vectors
At the end, the momentum of the balls is
In a direction away from the cylinder and
Not is the direction the cylinder is moving.
The total momentum of the system is divided
Along 3 vectors (minus that which was lost in
   the collision). The primary vector being that
Direction the cylinder is traveling. Each of the two
Balls have their final momentum along the other
Two vectors. Which are actually gravitational based
ballistic events, that arc downwards in a calculable manner.
By the ballistics path, knowing the weight of the balls
You can calculate their velocity
And by knowing the materials constants for the steel
And pvc, a reversing of the equation we can know the
Impact velocity and resulting force, thereby calculating
How much energy was converted into heat, and how much
Went into moving the cylinder 90-degrees to its path of motion.
May not have been a true 90, you whirled it kind of lopsided
And I'm only judging it from your camera angle.
But the motion is visibly transverse to the cylinders direction
And by Newtonian mechanics, must have been 180-degrees to
The direction of the balls (+/- a factor for relative curvatures)


The standard experiment shows that the balls have the same momentum
as the balls. NOT the momentum of the cylinder OR the momentum
Of the entire contraption cylinder,balls, and string.
Momentum is a quantity defined by mass.
The cylinder had more of it than the balls


In your experiment, the momentum that was transferred to the
cylinder from the balls, cancelled out because the balls were opposite
each other.


Perform the same experiment with both balls on one side
They go around, smack the side and the cylinder goes diagonal


Balls bounce off just like before and if it doesn't touch down first
The balls will give a backwards jolt at the end

[sm0ky2]

Before you attempt to quantify this experiment
You need a consistent launcher, other than your hand
So you know your input energy.


Maybe there with your software and the original footage
You feel comfortable using a digital frame rate for a clock
There are too many unknowns for me to place any accuracy
on that situation.
Conversion rates, frame buffers, storage rates, possible glitches
Software based frame alteration, file conversions,
And all before thebYOUTUBE anti-shake filter touched it.


You can assign an initial velocity and do the math to see exactly
What will happen. Looks similar to your video, but with more
precision, and elegance in flight.