搜搜考试网A heavy bird sits on a clothesline(which is basically just a
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A heavy bird sits on a clothesline(which is basically just a horizontal string) will the tension in the clothesline be greater if the line sags a lot or if it say a little?
大概意思是一直很重的鸟站在晒衣绳上（可以吧晒衣绳看成一条直线）,晒衣绳下弯的越多绳子的张力大呢还是下弯的越少绳子张力大?
大概意思是一直很重的鸟站在晒衣绳上（可以吧晒衣绳看成一条直线）,晒衣绳下弯的越多绳子的张力大呢还是下弯的越少绳子张力大?
晒衣绳下弯的越少绳子的张力大.
首先,这个绳子肯定是有弹性的,如果没有弹性的话,鸟站在上面,绳子是不会下弯的.
然后,如图所示.
PS：对于没有打结的绳子,每一点的拉力相同.
首先,这个绳子肯定是有弹性的,如果没有弹性的话,鸟站在上面,绳子是不会下弯的.
然后,如图所示.
PS：对于没有打结的绳子,每一点的拉力相同.
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