质量为m的木块放在光滑水平面上,在水平力作用下以静止开始运动,则运动t时F的功率A.F^2t/2mB.F^2t^2/2mC.F^2t/mD.F^2T^2/M我知道有种方法是P=FV,V=at,a=F/m F^2t/m ,可我用另一种方法s=1/2at^2=Ft^2/2m,w=F^2t^2/2m,
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![质量为m的木块放在光滑水平面上,在水平力作用下以静止开始运动,则运动t时F的功率A.F^2t/2mB.F^2t^2/2mC.F^2t/mD.F^2T^2/M我知道有种方法是P=FV,V=at,a=F/m F^2t/m ,可我用另一种方法s=1/2at^2=Ft^2/2m,w=F^2t^2/2m,](/uploads/image/z/7659478-46-8.jpg?t=%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E6%9C%A8%E5%9D%97%E6%94%BE%E5%9C%A8%E5%85%89%E6%BB%91%E6%B0%B4%E5%B9%B3%E9%9D%A2%E4%B8%8A%2C%E5%9C%A8%E6%B0%B4%E5%B9%B3%E5%8A%9B%E4%BD%9C%E7%94%A8%E4%B8%8B%E4%BB%A5%E9%9D%99%E6%AD%A2%E5%BC%80%E5%A7%8B%E8%BF%90%E5%8A%A8%2C%E5%88%99%E8%BF%90%E5%8A%A8t%E6%97%B6F%E7%9A%84%E5%8A%9F%E7%8E%87A.F%5E2t%2F2mB.F%5E2t%5E2%2F2mC.F%5E2t%2FmD.F%5E2T%5E2%2FM%E6%88%91%E7%9F%A5%E9%81%93%E6%9C%89%E7%A7%8D%E6%96%B9%E6%B3%95%E6%98%AFP%3DFV%2CV%3Dat%2Ca%3DF%2Fm+F%5E2t%2Fm+%2C%E5%8F%AF%E6%88%91%E7%94%A8%E5%8F%A6%E4%B8%80%E7%A7%8D%E6%96%B9%E6%B3%95s%3D1%2F2at%5E2%3DFt%5E2%2F2m%2Cw%3DF%5E2t%5E2%2F2m%2C)
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