What does the speed of 13kn mean?

Kn is the unit of force in mathematics.

Kn is a commonly used unit in engineering design and mechanical calculation, and it is a unit of force, while kilogram is a unit of mass, which cannot be directly converted with mass.

According to 1kn =1000 kgx1m/S2, the acceleration of gravity on the earth's surface is g=9.8m/s2, so the load effect caused by the mass of 1t is 9.8kn = 1000kg x g .. So on the earth's surface,

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