問題詳情

3.A 2 Kg disk slides on a smooth horizontal table and is  connected to an elastic cord whose tension is T=6r N , where r is the radial position of the disk in meters. If thedisk is at r=l m and is given an initial velocity,of 4 m/s in the transverse direction, what are the magnitudes of the radial and transverse components of its velocity when r=2 m?

參考答案

答案：B
難度：困難0.372881
統計：A(5),B(22),C(5),D(19),E(0)

用户評論

【Chiao Wen】評論

海龍滅火器：適用於ＡＢＣ類火災，滅火效果最佳，惟海龍滅火器會破壞臭氣層，所以一九九四年國際公約規定海龍滅火劑零生產、零消費，換言之已生產之海龍滅火劑可以繼續用，但不再繼續生產。

【Irene】評論

泡沫滅火器不能用於電器設備