Well, he was falling at 78 m/s, assuming g = 10 m / s 2 and the air friction is negligible.
Superman would be traveling at approximately 76.64 m/s when he hit the ground after falling for 7.80 seconds, assuming no air resistance. This calculation uses the formula for free fall velocity under the effect of gravity. It assumes the acceleration due to gravity is 9.81 m/s².
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