怎么用动能定理或机械能知识解决匀变速运动?如:一60kg的人抓着直杆从18m高处滑下,μ为0.5,人对杆最大压力为1800N,人落地时速度不能大于6m/s,令g=10m/s^2,问人落地最短时间.能否用动能定理解?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 23:39:53
![怎么用动能定理或机械能知识解决匀变速运动?如:一60kg的人抓着直杆从18m高处滑下,μ为0.5,人对杆最大压力为1800N,人落地时速度不能大于6m/s,令g=10m/s^2,问人落地最短时间.能否用动能定理解?](/uploads/image/z/14182480-64-0.jpg?t=%E6%80%8E%E4%B9%88%E7%94%A8%E5%8A%A8%E8%83%BD%E5%AE%9A%E7%90%86%E6%88%96%E6%9C%BA%E6%A2%B0%E8%83%BD%E7%9F%A5%E8%AF%86%E8%A7%A3%E5%86%B3%E5%8C%80%E5%8F%98%E9%80%9F%E8%BF%90%E5%8A%A8%3F%E5%A6%82%EF%BC%9A%E4%B8%8060kg%E7%9A%84%E4%BA%BA%E6%8A%93%E7%9D%80%E7%9B%B4%E6%9D%86%E4%BB%8E18m%E9%AB%98%E5%A4%84%E6%BB%91%E4%B8%8B%2C%CE%BC%E4%B8%BA0.5%2C%E4%BA%BA%E5%AF%B9%E6%9D%86%E6%9C%80%E5%A4%A7%E5%8E%8B%E5%8A%9B%E4%B8%BA1800N%2C%E4%BA%BA%E8%90%BD%E5%9C%B0%E6%97%B6%E9%80%9F%E5%BA%A6%E4%B8%8D%E8%83%BD%E5%A4%A7%E4%BA%8E6m%2Fs%2C%E4%BB%A4g%3D10m%2Fs%5E2%2C%E9%97%AE%E4%BA%BA%E8%90%BD%E5%9C%B0%E6%9C%80%E7%9F%AD%E6%97%B6%E9%97%B4.%E8%83%BD%E5%90%A6%E7%94%A8%E5%8A%A8%E8%83%BD%E5%AE%9A%E7%90%86%E8%A7%A3%3F)
xSnPNVl E |I1OHȃWĦ
E`LD\+~s}S"uM"!y=3sΙ*Xu*=)5P6,zvM^r'7Yٛ52bréˢ#LvzI)Tu@'d~dd7B#6dhu\1Q|n}X2*2z.JѭЎ@&
),ZDt)!;;,y&Ŭx¿O6WAjxUҪq*_DG%2i?]pi!r[؇ 4qV}̊Fw97!;bAnW`x٢)S;j|A@2rdnͪ%<怡'aϞ