Physics Analysis of Tesla's Broken Cybertruck Windows

Physics Analysis of Tesla's Broken Cybertruck Windows

During a large demonstration of Tesla's electric pickup truck, the vehicle's windows failed an onstage smash test. What could go wrong here.

 I don't know what to think about Elon Musk anymore. I mean the SpaceX stuff is great, and the Tesla car is great. But now we have a Tesla pickup truck unveiled on Thursday. (Simone Giertz had done it before!) Tesla Siebertruck looks weird - one person compared it to a futuristic door - but that's fine with me. My problem is with the unveiling itself.
If you missed it, Musk wanted to demonstrate the rudeness of the truck. They start by hitting the door of a normal truck with a sledgehammer. Yes, it makes a tooth. What about the Tesla truck? Bam! Do not scratch. It has a thicker steel exterior that makes it impenetrable for people with sledgehammers.
Oh, and windows? They are made of "Tesla Armor Glass". To compare, Musk's assistant drops a metal ball onto the glass of a normal car, which cracks. They then drop it on Tesla's special glass, and the ball bounces. They throw a big ball over it. Nothing. So the boy bounces the ball at Cybertbrook's driver's window and dodges it.
"Well, maybe that was a bit tricky," Musk says. So the man picks up the ball and backs it as slowly as he can to the rear passenger window. Now there are two broken windows. strange.
I don't know, if it was me, I've tested this demo before it went live. But, to the credit of Musk, he did just that with the show. The entire presentation was made in front of a prototype with broken windows. Bad optics, but you have to admire his aplomb.
What's wrong? Why didn't the ball fall on Tesla's luxury glass? To find out, we need some physics.

How much does the test weigh?

If you drop a metal ball, it moves as it falls. So to know how hard the glass is in the demo, we have to know the height from where it was released. For the first drop, the stage assistant stands atop the glass, raises his arm, and drops the ball - which looks about 1 meter away. High drops are a bit tricky. It would have been nice if they just told us, but that's okay, we can guess how long it will take to get hit.
If you drop an object, it starts at an initial velocity of zero, and the only force acting on it is gravity. The force of gravity, as we know it, depends on the local gravitational field (9.8 newtons per kilogram) and the mass of the object.