At 3,487 meters per second—nearly ten times the speed of sound—this was Zhang Tie's flight speed.
At 1,689 meters per second—nearly five times the speed of sound—this was the speed at which Zhang Tie could throw a Flying Spear while stationary.
The instant the Flying Spear left Zhang Tie's grasp, its relative speed to him was 1,689 meters per second, but its actual speed was 5,176 meters per second.
The gravitational acceleration gained during its descent from an altitude of over a thousand meters could be ignored.
When the 56-kilogram Flying Spear struck the building Zhang Tie had casually chosen, its kinetic energy was 56 divided by 2, multiplied by the square of 5,176.
The instant the Flying Spear left his hand, Heart-Punishing Divine Calculation's formidable calculations had already told Zhang Tie the kinetic energy contained in that throw—750,147,328 joules.
Over 750 million joules of kinetic energy was, by pre-Great Cataclysm standards, roughly equivalent to the explosion of 180 kilograms of TNT.
Of course, in this age, there were no longer any explosives apart from alchemical bombs. Moreover, the destructive power of kinetic attacks was more concentrated, and their lethality against individual targets was greater.
When the Flying Spear struck that building over twenty stories tall, more than ten of its upper floors instantly shattered. Dust billowed, rubble flew everywhere, and most of the building collapsed.
Zhang Tie then hurled the other two Flying Spears in his hand, continuing to strike the building that had already mostly collapsed. Under the destruction wrought by the three Flying Spears, the entire building crumbled and fell, ultimately leaving a crater several meters wide in the ground.
Afterward, while flying, Zhang Tie tested God's Dominator's ability to control objects for attacks.
Zhang Tie discovered that the inertia of his body's flight speed could not