英语时差：斜坡物理学（下）

Okay, so why not do what Galileo did when he first demonstrated this fact? Use a ramp instead of a building. Start your bowling ball and your golf ball at the same spot on the ramp and let go at the same time. If our intuitive sense of this situation is right, and heavier things fall faster than lighter ones, then they should also roll faster. Putting them on a ramp only slows things down so it’s easier to watch. Try this yourself, however, and you will see that the two roll at exactly the same rate. That is, both will roll faster and faster as they proceed down the ramp, but they will keep pace with each other and hit bottom at the same moment. Congratulations! You have demonstrated that all things fall at the same rate.Okay, so why not do what Galileo did when he first demonstrated this fact? Use a ramp instead of a building. Start your bowling ball and your golf ball at the same spot on the ramp and let go at the same time. If our intuitive sense of this situation is right, and heavier things fall faster than lighter ones, then they should also roll faster. Putting them on a ramp only slows things down so it’s easier to watch. Try this yourself, however, and you will see that the two roll at exactly the same rate. That is, both will roll faster and faster as they proceed down the ramp, but they will keep pace with each other and hit bottom at the same moment. Congratulations! You have demonstrated that all things fall at the same rate.