Introduction[]
In My Hero Academia Chapter 260, Miruko sends a steel door flying with a kick.
I'll be calculating the lifting strength required to perform this feat.
Calculation[]
Miruko Height = 159 cm (139 px)
Steel Door Height = 353.460431655 cm (309 px)
Steel Door Length = 173.870503597 cm (152 px)
Steel Door Width = 50.3309352518 cm (44 px)
Volume = 3093155.2331027 cm^3 or 3.09315523310270013 m^3
Steel Density equals 8050 kg per cubic meter.
Weight = 3.09315523310270013 x 8050 = 24899.8996265 kg
Now to find the distance the door is sent horizontally.
Horizontal Distance = 340.877697842 cm or 3.40877697842 m (298 px)
Now to find the distance the door is sent vertically.
Scan 2
Steel Door Length = 173.870503597 cm (78 px)
Panel Size = 642 px
Angular Size = object size*panel height in pixels/[object size in pixels*2*tan(70deg/2)]
Vertical Distance = 173.870503597 *642/[78*2*tan(70deg/2)] = 1021.90273101 cm or 10.2190273101 m
Initial velocity (Calculator) = 10.21 m/s
Momentum = 10.21 x 24899.8996265 = 254227.975187 N*s
Force (Assuming kicks last the same as punches) = 254227.975187/0.06 = 4237132.91978 N
Results = 432067.31 kg (Class K)
I'm not using the second door because it bounced off the floor instead of being sent flying.