• 2021-04-14
    已知图示机构的位置及尺寸,w1=常数,用相对运动图解法求图示位置F点的速度,正确的步骤是 。http://edu-image.nosdn.127.net/334FE185FFF093F2DC6C1D62590337CE.jpg?imageView&thumbnail=890x0&quality=100
  • http://edu-image.nosdn.127.net/7EDE632203CE5C25EF9153F3D8C39A1F.jpg?imageView&thumbnail=890x0&quality=100
    http://edu-image.nosdn.127.net/CD1343E65B6E69CAAAABBB300437A4CA.jpg?imageView&thumbnail=890x0&quality=100

    内容

    • 0

      图示直角折杆ABC,B点作用力F=2kN,求力F对A点的矩 。https://edu-image.nosdn.127.net/4801371F3162AC337617C9801931C52A.JPG?imageView&thumbnail=890x0&quality=100

    • 1

      图示均质细杆AB长为L,质量为m,绕A轴作定轴转动。设AB杆在图示铅直位置的角速度w=0,角加速度为http://edu-image.nosdn.127.net/9591D580408F1B6BC45952021FFB4E6E.png?imageView&thumbnail=890x0&quality=100。此时,AB杆惯性力系简化的结果是( )。 http://edu-image.nosdn.127.net/D249A05FABEB29C8A6503E92938B21B1.png?imageView&thumbnail=890x0&quality=100

    • 2

      已知图示有压混联输水管路(按长管计)各管段的沿程阻力系数http://edu-image.nosdn.127.net/1443EEDD6C2FA09BB126BDB9642044BA.png?imageView&thumbnail=890x0&quality=100,管径http://edu-image.nosdn.127.net/974CD2163F1D3BFAAEDC8DA84872F1CA.png?imageView&thumbnail=890x0&quality=100,管长http://edu-image.nosdn.127.net/76A594A1299928A8955B35FC20252D31.png?imageView&thumbnail=890x0&quality=100,流量http://edu-image.nosdn.127.net/1D52DAEDDD85EC829BD9C6E6F96AE143.png?imageView&thumbnail=890x0&quality=100,,则http://edu-image.nosdn.127.net/DAC36D2F41C6C3F84F776BC849094BA1.png?imageView&thumbnail=890x0&quality=100中k=( )。http://edu-image.nosdn.127.net/06283F2B8E549ACD83D8DDBBD7E4BE7C.png?imageView&thumbnail=890x0&quality=100

    • 3

      中国大学MOOC: 图示结构C点水平位移为0。http://edu-image.nosdn.127.net/9C0F7503068B5AA695014A424F6DF9FD.JPG?imageView&thumbnail=890x0&quality=100

    • 4

      http://edu-image.nosdn.127.net/773D34A3BCBF6E798A3BED135FB9ADA4.JPG?imageView&thumbnail=890x0&quality=100图示机构可使带传动张紧