Counting these numbers gives me 1,394 nails — which are not really so many. A 40- to 40-square-foot grid has 1,600 nails, and that’s more than you need to avoid in order to pierce the skin.
What if you replace the nails with a broken glass? It’s the same thing. Granted, glass may be sharper than a nail, but it also has other flat sides. As long as the affected area is large enough, the glass will not hurt anyone.
Here’s the secret: It doesn’t require strong skin, but physics.
Breaking Stones, Masses, and Running
Now, let’s move on to the side of the show where a soldier smashes a stone on the dude’s chest as he lies on a bed of nails. The most important study of physics here relates to Newton’s second law. This is the relationship between the web’s power on an object (Fthin), the weight of the object (m), and the speed of the object (a). If the object is forced to move in one direction (to make things easier), then we can represent this as the following equation:
The speed of an object tells you how the speed of the object changes. Therefore, if the object is silent, then the speed is zero continuously, which would be a zero speed. However, even if the object is moving, it may have zero acceleration as long as its speed does not change. If the item is rapidly expanding, then it may have additional value. This means that when something is delayed, it has a bad acceleration. (Note: This takes a move in one direction.)
Here is an example: Suppose two people are standing on a skateboard. (These are zero-friction skateboards — you can find them at the physics store.) On one board is an adult weighing 80 pounds[80 kg]and on the other is a 40-pound[40 kg]baby. every second (1 m / s).2). If I push the baby with the same force, the speed will be twice as high (2 m / s2), since the weight of the child is half the adult.