物体A静止在台秤的秤盘B上,A的质量为10.5kg,B的质量为1.5kg,弹簧质量不记,劲度系数k=800N/m,现给A施加一竖直方向的力F,使它一直向上做匀加速直线运动,已知力F在开始的t=0.2s内是变力,此后是恒力
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![物体A静止在台秤的秤盘B上,A的质量为10.5kg,B的质量为1.5kg,弹簧质量不记,劲度系数k=800N/m,现给A施加一竖直方向的力F,使它一直向上做匀加速直线运动,已知力F在开始的t=0.2s内是变力,此后是恒力](/uploads/image/z/9487899-27-9.jpg?t=%E7%89%A9%E4%BD%93A%E9%9D%99%E6%AD%A2%E5%9C%A8%E5%8F%B0%E7%A7%A4%E7%9A%84%E7%A7%A4%E7%9B%98B%E4%B8%8A%2CA%E7%9A%84%E8%B4%A8%E9%87%8F%E4%B8%BA10.5kg%2CB%E7%9A%84%E8%B4%A8%E9%87%8F%E4%B8%BA1.5kg%2C%E5%BC%B9%E7%B0%A7%E8%B4%A8%E9%87%8F%E4%B8%8D%E8%AE%B0%2C%E5%8A%B2%E5%BA%A6%E7%B3%BB%E6%95%B0k%3D800N%2Fm%2C%E7%8E%B0%E7%BB%99A%E6%96%BD%E5%8A%A0%E4%B8%80%E7%AB%96%E7%9B%B4%E6%96%B9%E5%90%91%E7%9A%84%E5%8A%9BF%2C%E4%BD%BF%E5%AE%83%E4%B8%80%E7%9B%B4%E5%90%91%E4%B8%8A%E5%81%9A%E5%8C%80%E5%8A%A0%E9%80%9F%E7%9B%B4%E7%BA%BF%E8%BF%90%E5%8A%A8%2C%E5%B7%B2%E7%9F%A5%E5%8A%9BF%E5%9C%A8%E5%BC%80%E5%A7%8B%E7%9A%84t%3D0.2s%E5%86%85%E6%98%AF%E5%8F%98%E5%8A%9B%2C%E6%AD%A4%E5%90%8E%E6%98%AF%E6%81%92%E5%8A%9B)
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