From the article: "In a crash, that force could be 544 kilograms (1,200 pounds)"
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While I appreciate the attempt to convert from the odd-ball Imperial measurements to SI measurements, this one isn't correct.

The word "pound" actually has two meanings, one for mass and another for force.  In this case they were using the latter meaning.  One pound of force is the force experience by one pound of mass under the acceleration of standard earth gravity.  While this can be kind of useful to visualize the impact of things in the real world, it can also be confusing due to the two meanings for the same word.

Kilograms has only one meaning, mass.  In SI units there is no "Kilograms of force". The correct unit to use here would be the newton.  So the correct version of the phase would be:

"In a crash, that force could be 5338 newtons (1,200 pound-force)"