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Spider-Man begins to chase the villans as they try to escape by van.
Spider-Man finds villans selling dangerous weapons.
Trying to stay on the track of the villans, Spider-Man uses his webs to attach himself to the back of the van.
Spider-Man is dragged through streets of New York (the borough is not specified), and hits a brick pillar and continues to chase the villans as if nothing occured.
The bad physics occurs at 2:06
The Weight Limit:
Background Information
The average brick weight in at around 3.5 kilograms, which converts to 34.3 Newtons.
In the scene, Spider-Man hits a pillar of bricks that counted to roughly 17 by 5, so the side of bricks that Spider-Man hit was made up of 85 bricks. These 85 bricks have a weight of 297.5 kilograms (if each brick were to weigh 3.5 kilograms), which is well above the breaking point of some of the smaller bones in the human body.
The bones of a human body can only withstand so much weight before they crack under the pressure.
The collar bone, and elbow break when 8 pounds (3.6 kg) or more are applied (take motion into account). Other bones fracture when just 25 pounds (11 kg) 1 lb is equal to 4.45 Newtons, so when 35.6 Newtons of force are applied to these areas of the body, a break, or at the very least a fracture should occur.
The residential speed limit in New York State is 30 mph. In the scene, the drivers appear to be speeding so it is estimated that the speed is 50 mph. This equates to 22.35 m/s. The duration of Spider-Man being dragged was timed as 46.20 seconds
v= 22.35 m/s
t= 46.20 s
a= ?
a= (22.35m/s)/(46.20 s)
a=0.4838 m/s^2
Fapp= Fnet-Ff
(m)a - (μfrict-sliding)Fnorm
m= 64 kg (Tom Holland)
a= 0.4838 m/s^2
μfrict-sliding of rubber against concrete= 0.65
Fnorm= -Fg
Fg= m(g)
64kg(-9.8m/s^2)
-Fg=-627.2 N (negatives cancel) .... = Fnorm
Fapp= (64kg)(0.4838 m/s^2)- (0.65)(627.2 N)
Fapp= -3.8x10^2 N
* negative due to direction
When friction, acceleration, and other factors are taken into account the amount of force Spier-Man hits the bricks with is the equivalent of 37.6 kilograms. This is above the minimum fracture weight, and would most likely break an elbow or collarbone.
Conclusion:
The purpose of this investigation was to assess a scene from Spider-Man: Homecoming using Newton's Laws of Motion, and research on humans bones. Using Newton's Laws combined with further research, it was determined that Spider-Man (Tom Holland) can not hit a pillar of bricks while being dragged by a van, and leave the incident unscathed. Spider-Man would have sustained some injuries. By using the equations, a=v/t, and Fnet= Fapp+Ff this was proved.
The human collarbone and elbow break under a minimum of 8 pounds(3.6 kilograms). Other bones in the human body fracture under 25 pounds (11 kilograms). Spider-Man slams into 85 bricks (3.5 kilograms each) that weigh in at about 297.5 kilograms. The minimum breaking weight of a collarbone and an elbow are 3.6 kilograms, and fracture weight of some bones are 11 kilograms.
To determine if Spider-Man would have sustained an injury, the time (46.20 seconds) and velocity (22.35m/s) were found by analyzing the scene. The time and velocity were used to find the acceleration, which is 0.4838 m/s^2. The mass of the actor who played Spier- Man (Tom Holland) was also found, and is 64 kilograms.
This data was then used to find the force applied. The force applied was 3.8x10^2 Newtons, which converted to 297.5 kilograms. 297.5 kilograms well exceeds the breaking and fracture statistics, therefore Spider-Man would have received at least one noticeable injury, which he does not in the film.