物理水杯问题

2025-03-23 11:59:25
推荐回答(5个)
回答1:

水是因为受到重力才会向下流,杯子也是受到重力才向下掉,因为重力的加速度相等,所以水杯和水保持相对静止,且水处于失重状态,所以不会流下。

回答2:

理论的回答
自由落体的杯子和水都处在完全失重状态
就是认为重力对他们没有效果

也可以这样想
水往低处流
因为杯子是静止的
所以水会从孔里露出来

下坠时
水也往低处流
但是杯子也在下落
两者都在下落
所以相对位置没有改变,即水不往外流

回答3:

■也可以这样回答
做自由下落时杯子相对于水是一个非惯性参照系,此时在这个非惯性系统里,水受到向下的重力,和向上的惯性力,这两个力大小相等=Mg,方向相反,所以受力平衡,与杯子保持相对静止的平衡状态。

回答4:

两个物体加速度相同的向同一方向运动,那么忽略其他影响的情况下可以视二者为相对静止,所以水不会相对杯子"流下来"

回答5:

因为杯子与水下落有相对的加速度~~在高空坠下又承受空气的压力~~所以当它们从高空坠下时水不往外流.

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