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把质量为2kg的物体竖直向上抛出,初速度是12m/s,经1s物体到达所能达到的最

题型:问答题

题目:

把质量为2kg的物体竖直向上抛出,初速度是12m/s,经1s物体到达所能达到的最高点.设空气阻力大小不变,则前2s内物体重力势能的增加量是多大?空气阻力对物体做了多少功?(g取10m/)

答案:

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答案:B题目分析:本题是时政题,掌握年度时政即可回答。

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