学习了惯性的知识以后，只要同学们注意观察，就会发现在我们的周围有很多有趣的现象都可以用惯性的知识来解释，请看下面这个问题：小明站在一只做匀速直线运、划船尾上（如图1），当小船经过靠岸边的一棵树时，一根树枝挂了一条长纸正好垂落在小明的正上方，小明想树枝上挂纸 After learning the inertia of knowledge, as long as the students pay attention to observation, we will find that there are many interesting phenomena in our surroundings that can be explained with inertial knowledge. Please look at the following question: Xiao Ming stands on a straight line, At the end of the rowing boat (Figure 1), when the boat passes by a tree at the beachside, a long piece of paper hangs directly on top of Xiaoming. Xiao Ming wants to hang a piece of paper on the branch.