如图所示,质量m=1.0kg的物块放在倾角为θ的斜面上,从A点由静止开始释放,过B点时速度为2m/s,过C点时速度为3m/s.已知BD长为2.1m.(g取10m/s^2).求:⑴物块下滑的加速度为多大?⑵选D处为零势能面,
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![如图所示,质量m=1.0kg的物块放在倾角为θ的斜面上,从A点由静止开始释放,过B点时速度为2m/s,过C点时速度为3m/s.已知BD长为2.1m.(g取10m/s^2).求:⑴物块下滑的加速度为多大?⑵选D处为零势能面,](/uploads/image/z/11035678-22-8.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E8%B4%A8%E9%87%8Fm%3D1.0kg%E7%9A%84%E7%89%A9%E5%9D%97%E6%94%BE%E5%9C%A8%E5%80%BE%E8%A7%92%E4%B8%BA%CE%B8%E7%9A%84%E6%96%9C%E9%9D%A2%E4%B8%8A%2C%E4%BB%8EA%E7%82%B9%E7%94%B1%E9%9D%99%E6%AD%A2%E5%BC%80%E5%A7%8B%E9%87%8A%E6%94%BE%2C%E8%BF%87B%E7%82%B9%E6%97%B6%E9%80%9F%E5%BA%A6%E4%B8%BA2m%2Fs%2C%E8%BF%87C%E7%82%B9%E6%97%B6%E9%80%9F%E5%BA%A6%E4%B8%BA3m%2Fs.%E5%B7%B2%E7%9F%A5BD%E9%95%BF%E4%B8%BA2.1m.%EF%BC%88g%E5%8F%9610m%2Fs%5E2%EF%BC%89.%E6%B1%82%EF%BC%9A%E2%91%B4%E7%89%A9%E5%9D%97%E4%B8%8B%E6%BB%91%E7%9A%84%E5%8A%A0%E9%80%9F%E5%BA%A6%E4%B8%BA%E5%A4%9A%E5%A4%A7%3F%E2%91%B5%E9%80%89D%E5%A4%84%E4%B8%BA%E9%9B%B6%E5%8A%BF%E8%83%BD%E9%9D%A2%2C)
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