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问题 问答题

如图，滚摆在下降的过程中，速度越来越快，在这过程中是______能转为______能．

答案

图中滚摆下降的过程中，高度在降低，因此，重力势能在减小；速度越来越快，说明动能在增大．根据能量的转化与守恒，在这一过程中，是重力势能转化成了动能．

故答案为：重力势，动．

填空题

按规律填数：6.25，2.5，1，（    ），（    ），0.064。
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翻译题

  Beijing Olympic Park

In the north of Beijing, there is China’s largest city park---- Beijing Olympic Park. It covers 12 square kilometers. During the 2008 Olympic Games, the park hosted the opening and closing ceremonies, and 15 major events. 小题1: After the Olympics, the park would be used to help keep the air fresh in the city.

The Bird’s Nest and Water Cube are both in it. There are more than 80 sculptures standing in the centre of the park for us to enjoy. 小题2: They are showing the Olympic spirit of “Faster, Higher and Stronger.
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