The guy shoots webs everywhere and yet is one of the most popular superheroes worldwide. That web must be pretty strong in order to hold him up, theoretically speaking, I wonder what kind of physics go into it?
No. Peter Parker doesn't shoot webs out of holes in his wrists. He made devices that shoot them. But how strong are they actually? We can solve this using the momentum principle and a scene where his webs catch a car and slow it down to a stop. Let's say the car weighs 2000kg, and he slowed it down in 1 second to rest. Through calculations of initial and final momentum, the web would have a tension of 39,200 Newtons. Just as a comparison, a steel cable's maximum tensile strength is only 6,503 Newtons.