如图甲所示,重为80牛的物体在大小为15牛,方向水平向左的拉力F1作用下,在水平地面上以3米/秒的速度做匀速直线运动,滑轮质量、绳子质量和轴摩擦均不计.(1)拉力F1的功率为▲瓦.(2)现改
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![如图甲所示,重为80牛的物体在大小为15牛,方向水平向左的拉力F1作用下,在水平地面上以3米/秒的速度做匀速直线运动,滑轮质量、绳子质量和轴摩擦均不计.(1)拉力F1的功率为▲瓦.(2)现改](/uploads/image/z/2394566-62-6.jpg?t=%E5%A6%82%E5%9B%BE%E7%94%B2%E6%89%80%E7%A4%BA%2C%E9%87%8D%E4%B8%BA80%E7%89%9B%E7%9A%84%E7%89%A9%E4%BD%93%E5%9C%A8%E5%A4%A7%E5%B0%8F%E4%B8%BA15%E7%89%9B%2C%E6%96%B9%E5%90%91%E6%B0%B4%E5%B9%B3%E5%90%91%E5%B7%A6%E7%9A%84%E6%8B%89%E5%8A%9BF1%E4%BD%9C%E7%94%A8%E4%B8%8B%2C%E5%9C%A8%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E4%B8%8A%E4%BB%A53%E7%B1%B3%2F%E7%A7%92%E7%9A%84%E9%80%9F%E5%BA%A6%E5%81%9A%E5%8C%80%E9%80%9F%E7%9B%B4%E7%BA%BF%E8%BF%90%E5%8A%A8%2C%E6%BB%91%E8%BD%AE%E8%B4%A8%E9%87%8F%E3%80%81%E7%BB%B3%E5%AD%90%E8%B4%A8%E9%87%8F%E5%92%8C%E8%BD%B4%E6%91%A9%E6%93%A6%E5%9D%87%E4%B8%8D%E8%AE%A1.%EF%BC%881%EF%BC%89%E6%8B%89%E5%8A%9BF1%E7%9A%84%E5%8A%9F%E7%8E%87%E4%B8%BA%E2%96%B2%E7%93%A6.%EF%BC%882%EF%BC%89%E7%8E%B0%E6%94%B9)
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