题目

如图所示，请说出可能发生的现象和表明的物理问题： 甲图：看到的现象是                               ，表明                     。              乙图：看到的现象是                                ，  表明                       。                                                                                                                                                                                                                                                                                                                                                 答案：钢珠推动物体移动一定距离、重力势能转化为动能、重物将木桩打入地下、重物将木桩打入地下、重力势能转化为动能

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