粤教版高中《物理》(必修2)第48面有这样一段文字:“……如果苹果树很高,长到月球那么高,苹果还会落地吗?苹果受到的重力会随高度而减小,但不会是零,所以,苹果还是会落地的.”事实上,由于树很高时地球自转的效应不能忽略,因此,上述结论是不可信的.下面对从不同假设高度的苹果树上脱落的苹果的去向作一简要分析,这里为讨论方便,以在赤道上的苹果树为例.一、竖直下落的情形 Cantonese version of high school “Physics” (Compulsory 2) 48th page has this paragraph of text: “... If the apple tree is tall, grows to the moon so high, the apple will fall to ground? The gravity that the apple receives will decrease with height Small, but not zero, so apples still fall. ”" In fact, the above conclusion is not credible due to the fact that the effect of the Earth’s rotation can not be ignored at very high trees. The whereabouts of apple trees on the apple tree to make a brief analysis, here for ease of discussion, in the apple tree on the equator as an example.