如图所示,质量
的物体在光滑的水平面上做匀速直线运动,当受到
的水平拉力作用后,开始做匀加速直线运动,5s内运动了20m,在这5s内,拉力对物体做功![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1be388a79fdb7c22e216f9c59df7cc.png)
___________ J,拉力的平均功率![](https://staticzujuan.xkw.com/quesimg/Upload/formula/112d8190c3d0fbd95b6613f25b39a7ab.png)
___________ W,5s末拉力的瞬时功率P![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
___________ W。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/855074537769bed389f218a6e50beb16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ecfdf3fe1551d71eb20aee693c99f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1be388a79fdb7c22e216f9c59df7cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/112d8190c3d0fbd95b6613f25b39a7ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
更新时间:2024-04-30 10:53:47
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【知识点】 平均功率与瞬时功率的计算
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