中国大学MOOC: 略去质量的弹簧原长为2L,刚度为k,两端固定并处于水平位置,在弹簧中点挂一重物,则重物下降x路程中弹性力所作的功为____________________。【图片】
举一反三
- 略去质量的弹簧原长为2L,刚度为k,两端固定并处于水平位置,在弹簧中点挂一重物,...aa2f3bdcbff7740f.png
- 略去质量的弹簧原长为2L,刚度为k,两端固定并处于水平位置,在弹簧中点挂一重物,则重物下降x路程中弹性力所作的功为____________________。[img=760x795]1803479b68999f7.jpg[/img] A: [img=242x43]1803479b736c0d9.png[/img] B: [img=231x31]1803479b7e9e37c.png[/img] C: [img=240x31]1803479b89776bd.png[/img] D: [img=91x43]1803479b92571b4.png[/img]
- 略去质量的弹簧原长为2L,刚度为k,两端固定并处于水平位置,..._______________。【图片】
- 如图所示,质量可以忽略不计的弹簧原长为2L,刚度系数为k,两端固定并处在水平位置,在弹簧中点挂重物,则重物下降x路程中弹性力所做的功为____________。[img=191x147]1802ddbf4612b55.png[/img] A: [img=184x28]1802ddbf538d7dd.png[/img] B: [img=166x28]1802ddbf5c318bd.png[/img] C: [img=175x28]1802ddbf69353ba.png[/img] D: [img=191x29]1802ddbf7660558.png[/img]
- 略去质量的弹簧原长为2L,刚度为k,两端固定并处于水平位置,在弹簧中点挂一重物,则重物下降x路程中弹性力所作的功为________。<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/a23821c4ff754f00aa2f3bdcbff7740f.png" /> A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/484da0f3795d4eb39a41a86f9515c4d6.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/a11e055bb31c450c8a9359b0339db3bf.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/6b19f1dc9b8b40ce92f397749e440b2c.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/a1a5d63b6d424b68a3e81a565a849360.png" />