A Simple Question in Physics

[Chris Bristow]

"The rest"? You can only see two of the rifles the rest is a blur. The 2nd darker one has a higher angle compared to the first but if you trace its direction to the victim it also hits below the head. That 2nd darker image of a rifle is from the 3rd or fourth shooter in line. Trace the trajectory to the 3rd or 4th victim and both hit below the head. The 3rd victim is either taller or on a slight rise. If you trace the tops of the victims heads it illustrates the shrinking vanishing point while showing that 3rd victim is higher or taller than the others.
 But the fact remains that when shot in a standing position the knees and waist dictate much of the head movement.

[John Mytton]

"The rest"? You can only see two of the rifles the rest is a blur. The 2nd darker one has a higher angle compared to the first but if you trace its direction to the victim it also hits below the head. That 2nd darker image of a rifle is from the 3rd or fourth shooter in line. Trace the trajectory to the 3rd or 4th victim and both hit below the head. The 3rd victim is either taller or on a slight rise. If you trace the tops of the victims heads it illustrates the shrinking vanishing point while showing that 3rd victim is higher or taller than the others.
 But the fact remains that when shot in a standing position the knees and waist dictate much of the head movement.

With so many shooters how do you know which man was being shot by the 2nd shooter? Here's the angle a split second before the shots(the yellow line) to the men's heart's(the red line) which imo would be dramatically less but anyway here's a graphic where I think the rifles are pointed as compared to where the men's hearts would be.





JohnM

[Michael T. Griffith]

Rather than reinvent the wheel, please see my reply in my thread on JFK's backward head movement and the neurospasm and jet-effect theories:

https://www.jfkassassinationforum.com/index.php/topic,2623.msg93359.html#msg93359

[Chris Bristow]

Real life isn't Hollywood, these soldiers are all shot in the head with fmj bullets and no one is violently thrown forward, they just fall down and move back towards the shooters.



JohnM

The red line in your last post made no sense to me but I will say it is possible some of the shots,  other than the closest shooter, went to the head. So it is possible for a head not to be thrust forward from a rear shot. In some cases the head will move forward and in other circumstances it does not. When the knees buckle it can cause the torso to tilt backwards but most of the victims torso's in the film stay straight till they fall to the ass. A possibility is that the forward motion imparted by the bullet was countered by the backward tilt of the torso. This is a rabbit hole and I will leave it to ballistic experts because I don't have a problem with the forward head movement issue.
 But I have always had a problem with using standing victims to illustrate head movement. You say they fall backward toward the shooter. Are you trying to support the rear movement of JFK's head with those victims falling backward after landing on their butts?   

[Joe Elliott]

I am not surprised that CTers do not answer this question, but I am surprised that LNers don’t either, even those who made posts here.

A bullet will “push” a target, like a head. That is why the President’s head moves forward during z312-z313. The bullet only takes 1 to 2 milliseconds to pass through the head, after which, the bullet, or its fragments, continue on.

Does this acceleration, this push, only last for 1 to 2 milliseconds? Or does it last for a lot longer, like 200 to 250 milliseconds, continuing to push the head after the bullet has left?

Please vote on an answer.

[John Mytton]

I am not surprised that CTers do not answer this question, but I am surprised that LNers don’t either, even those who made posts here.

A bullet will “push” a target, like a head. That is why the President’s head moves forward during z312-z313. The bullet only takes 1 to 2 milliseconds to pass through the head, after which, the bullet, or its fragments, continue on.

Does this acceleration, this push, only last for 1 to 2 milliseconds? Or does it last for a lot longer, like 200 to 250 milliseconds, continuing to push the head after the bullet has left?

Please vote on an answer.

but I am surprised that LNers don’t either, even those who made posts here.

Hi Joe, I already agreed with you and I have now voted.

JohnM

[Michael Carney]

 I would like to add a comment that includes pictures but I don't see any way to do it. Could someone plus give me a one minute block of instruction on how to do it, thanks.