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How long can a man hang in mid air on a vertical leap or long jump?
Wiki User
∙ 16y ago
It's very hard for a human to raise his center of gravity more than 1 meter ( Michael Jordan could jump about 1.1m and Larry Bird could jump vertically about 0.8 m ). Once at the maximum height, the time required to fall back is 1= (1/2)gT^2 or T = SQRT (2/g)= SQRT (2/9.8) = 0.45 sec. The initial velocity to get up to 1m is V^2= 2gX1 or V = SQRT(2g) = 4.4 m/sec. Assume the average upward speed during the rise is 4.4/2 = 2.2m/s, the time required to rise is 1m/2.2m = 0.45 sec or the same time as for the fallback. Thus, the total time in the air is 0.90 sec.
The appearance of the "hang time" being longer is a consequence of the player raising his arm with the ball as he falls so that the ball appears to be at the same height longer than his center-of-gravity.
For zero time. When you look at the center of gravity of the person, there is not much difference between a person and a ball tossed into the air. The "hang-time" in ballet, Basketball or gymnastics is an illusion AND a demonstration of strong muscles and great skill.
Wiki User
∙ 16y ago
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