向心力类1.用重力加速度为g=9.8m/s^2,地球半径为R=6.37*10^6米求第一宇宙速度2.用手旋转一有水的水杯在垂直平面上运动,设手臂长0.75米,要使水不从顶上流出,那么最低的过顶速度为多少?
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![向心力类1.用重力加速度为g=9.8m/s^2,地球半径为R=6.37*10^6米求第一宇宙速度2.用手旋转一有水的水杯在垂直平面上运动,设手臂长0.75米,要使水不从顶上流出,那么最低的过顶速度为多少?](/uploads/image/z/5943676-4-6.jpg?t=%E5%90%91%E5%BF%83%E5%8A%9B%E7%B1%BB1.%E7%94%A8%E9%87%8D%E5%8A%9B%E5%8A%A0%E9%80%9F%E5%BA%A6%E4%B8%BAg%3D9.8m%2Fs%5E2%2C%E5%9C%B0%E7%90%83%E5%8D%8A%E5%BE%84%E4%B8%BAR%3D6.37%2A10%5E6%E7%B1%B3%E6%B1%82%E7%AC%AC%E4%B8%80%E5%AE%87%E5%AE%99%E9%80%9F%E5%BA%A62.%E7%94%A8%E6%89%8B%E6%97%8B%E8%BD%AC%E4%B8%80%E6%9C%89%E6%B0%B4%E7%9A%84%E6%B0%B4%E6%9D%AF%E5%9C%A8%E5%9E%82%E7%9B%B4%E5%B9%B3%E9%9D%A2%E4%B8%8A%E8%BF%90%E5%8A%A8%2C%E8%AE%BE%E6%89%8B%E8%87%82%E9%95%BF0.75%E7%B1%B3%2C%E8%A6%81%E4%BD%BF%E6%B0%B4%E4%B8%8D%E4%BB%8E%E9%A1%B6%E4%B8%8A%E6%B5%81%E5%87%BA%2C%E9%82%A3%E4%B9%88%E6%9C%80%E4%BD%8E%E7%9A%84%E8%BF%87%E9%A1%B6%E9%80%9F%E5%BA%A6%E4%B8%BA%E5%A4%9A%E5%B0%91%3F)
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