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[ Information | Background | The CyberTeaser | Quantum News | Miscellaneous Stuff ] Solution to CyberTeaser B153The flying ball has to work against air resistance and thus continuously loses energy. So the total energy of the rising ball at a certain height is greater than that of the falling ball at the same height. Since the potential energy at these two moments is the same, the kinetic energy and, therefore, the speed of the ball at a certain height is greater when it rises than when it falls. So the time of descent is greater than the time of ascent. CyberTeaser Archive
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