在“探究*力和*簧伸长量的关系,并测定*簧的劲度系数”的实验中,实验装置如图所示.所挂钩码的重力相当于对*簧提...
问题详情:
在“探究*力和*簧伸长量的关系,并测定*簧的劲度系数”的实验中,实验装置如图所示.所挂钩码的重力相当于对*簧提供了向右的恒定拉力.实验时先测出不挂钩码时*簧的自然长度,再将5个钩码逐个挂在绳子的下端,每次测出相应的*簧总长度.
(1)有一个同学通过以上实验测量后把6组数据描点在坐标系图中,请作出F-L图线.
(2)由此图线可得出该*簧的原长L0=________ cm,在**限度内的劲度系数k=________ N/m.
(3)试根据该同学以上的实验情况,帮助他设计一个记录实验数据的表格(不必填写其实验测得的具体数据).
(4)该同学实验时,把*簧水平放置与*簧悬挂放置相比较,
优点在于:________________________________________________________________
缺点在于:________________________________________________________________
【回答】
(1) F-L图线如图所示:(最后一个点连线也可以)········································· (2分)
(2) L0=5 cm········································································································· (2分)
k=20 N/m···································································································· (2分)
(3) 记录数据的表格如上表················································································· (2分)
(4) 优点是:可以避免*簧自身重力对实验的影响.······································· (1分)
缺点是:*簧与桌面及绳子与滑轮间存在的摩擦会造成实验误差············ (1分)
知识点:未分类
题型:实验,探究题