第2个回答 2008-04-12
Law is free-falling, the quality of different objects in the landing or the same, even if only a 1 kg, the other 10 kilograms, falling speed is the same! Galileo was suspected of "quality first large objects landing" This is, in his decision to do the famous "Leaning Tower of Pisa" before the experiment, he first proposed a paradox, namely, the above-mentioned you 20-10-tying the ball fell at the same time with the situation.
This is the paradox: if "quality of the objects first floor," That is correct, then obviously the ball-20 landed first, but the ball is tying the two together, can be regarded as a heavy 30 objects, according to "the quality of the objects first floor," that this object should be earlier than the two-floor, this is not contradictory?
You the beginning of the first sentence of the "gravity of the case should be that it will increase the speed," that you do not understand the physical meaning of this experiment. Experiment results show that the speed of the reasons for not produce, but from the reasons for the acceleration. You may feel objects fall from height, it is with the speed of gravity, is the acceleration of gravity produced a g, so that the velocity of an object from 0 to the maximum