Spider-Man casually stops a big gear from moving
Btw as a heads-up i'm not really an expert on quantum colliders so i don't know what these parts are called
Size and Mass of gear[]

Spider-Man: 205 pixels or 178cm (Using mainline 616 Spidey's height, i know this Spidey is based on the Ultimate version but that one's a kid while this one is an adult)
178cm/205 = 0.868292cm
Gear Part Diameter: 823 pixels or 714.6cm/7.146m
Gear Part Radius = 7.146m/2 = 3.573m
Pider-Man's Head: 26 pixels or 22.57cm

Ider-Man's Head: 19 pixels or 22.57cm
Panel Height: 804 pixels
Gear Part Length = 22.57cm x 804 : (19 x 2 x tan(70deg/2)) = 681.98cm or 6.8198m
Gear Part Volume = π x 3.573m^2 x 6.8198m = 273.519m3, assuming 90% hollowness gives us 27.3519m3
Assuming these parts are made from steel which has a 7850kg/m3
Gear Part Weight = 27.3519m3 x 7850kg = 214712.415kg
We're also gonna have to multiply that since multiple parts were stopped, i counted 12 of these parts in the shots of the complete machine we get although i could be a little off
214712.415kg x 12 = 2576548.98kg
Force and KE[]

Der-Man's Head: 19 pixels or 22.57cm
22.57cm/19 = 0.841825cm
Distance traveled by part: 151 pixels or 127.11cm/1.2711m
The part traveled this distance in 1 frame or 0.041666s
Speed = 1.2711m/0.041666s = 30.5068m/s
It seems like Spidey stoped the gear in about 3 frames which would be 0.124998s
Deceleration = 30.5068m/s/0.124998s = 244.0583m/s^2
Force = 2576548.98kg x 244.0583m/s^2 = 628828163.92N or 64100.73026 Tonnes of Force (Class M)
Since i'm curious i'm also going to calc the KE of this gear
KE = 0.5 x 2576548.98kg x 30.5068m/s^2 = 1198951780.15 joules or 0.286556 Tons of TNT (Building level)
Update[]
Ok so apperently gears aren't really all that hollow so i'm also gonna do the calcs without applying hollowness
Gear Part Volume: 273.519m3
Density of steel is 7850kg/m3
273.519m3 x 7850kg = 2147124.15kg
there was 12 of these identical gear parts
2147124.15kg x 12 = 25765489.8kg
Force = 25765489.8kg x 244.0583m/s^2 = 6288281639.2 Newtons or 641007.3026 Tonnes of Force (Class M)
KE = 0.5 x 25765489.8kg x 30.5068m/s^2 = 11989517801.5 Joules or 2.86556 Tons of TNT (Large Building level)