Feat: Iron Fist, ‘Deadly Hands Of Kung Fu’ #18

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IN MARTIAL ARTS

IRON FIST (DANIEL RAND)
EARTH-616

In ‘The Deadly Hands Of Kung Fu’ (1975) #18, titled “Fists Of Darkness, Fists Of Death”, Danny Rand performs a super strength feat. In the subway, two outlaws are fleeing capture. During their escape, they bump a young woman onto the train tracks. In order to save her, Danny stops the train with the Iron Fist.

How much super strength does it take for Iron Fist to stop a speeding subway train?

IN THE ISSUE, DANNY SAVED A YOUNG WOMAN. TO THIS END, DANNY STRUCK THE SUBWAY TRAIN WITH THE IRON FIST TO A FULL-STOP.

IMPORTANTLY, IRON FIST GENERATED -11795931.5214 NEWTONS OF FORCE. OR, -11795931.5214 JOULES OF WORK. SIMILARLY, THE EQUIVALENT OF 0.1072357411 PERCENT THE POWER OUTPUT OF NEW YORK CITY. ENOUGH TO SHATTER A STREET.

SUPER STRENGTH FEAT:

MULTI-CITY BLOCK

Super Strength: Multi-City Block 25%

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Danny Rand used the Iron Fist to stop a train to a full-stop.

We will use kinematics and Newton’s second law of motion to estimate the force of the Iron Fist.

KINEMATICS AND NEWTON’S SECOND LAW

Watch the video on “The Force Required To Stop A Car”.

NUMBER CRUNCHING

First, let’s enunciate the variables. The average mass of the New York subway train is 38600 kg. Its top speed is 24.7222 m/s. We assume the force Danny exerted was over a meter distance. Second, let’s calculate the acceleration.

a = -vi2/2Δx = -(24.72222 m/s)2/(2*1 m) = -305.594080864 m/s2.
F = ma = (38600 kg)( -305.594080864 m/s2) = -11795931.5214 N.

Finally, let’s calculate the work done.
W = Fd = (-11795931.5214 N)(1 m) = -11795931.5214 J.

SUPER STRENGTH

To sum, Iron Fist generated -11795931.5214 N of force to stop the subway train to a full-stop. Moreover, Danny had to generate a City Block Level of Super Strength since he likely stopped the subway train with a punch 0.1072357411 percent of the power output of New York City.

Toggle the Toggle Arrow below to view the calculations.

Calculations for Iron Fist, ‘Deadly Hands Of Kung Fu’ #18

Mass Of NY Subway Train = 85200 lb = 38600 kg.
Top Speed of NY Subway Train = 55 mph = 89 km/hr = 24.72222 m/s.

a = -vi^2/2Δx = -(24.72222 m/s)^2/(2*1 m) = -305.594080864 m/s^2.
F = ma = (38600 kg)( -305.594080864 m/s^2) = -11795931.5214 N.
W = Fd = (-11795931.5214 N)(1 m) = -11795931.5214 J.

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SOURCES

The Deadly Hands of Kung Fu #18 in Comic Vine.

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