如图一所示,在静止平板车上放置一个质量为10kg的物体A,它被拴在一个水平拉伸的弹簧一端,且处于静止状态,此时弹簧的拉力为5N.若平板车从静止开始向右做加速运动,且加速度逐渐增大,但a<=
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![如图一所示,在静止平板车上放置一个质量为10kg的物体A,它被拴在一个水平拉伸的弹簧一端,且处于静止状态,此时弹簧的拉力为5N.若平板车从静止开始向右做加速运动,且加速度逐渐增大,但a<=](/uploads/image/z/14562148-4-8.jpg?t=%E5%A6%82%E5%9B%BE%E4%B8%80%E6%89%80%E7%A4%BA%2C%E5%9C%A8%E9%9D%99%E6%AD%A2%E5%B9%B3%E6%9D%BF%E8%BD%A6%E4%B8%8A%E6%94%BE%E7%BD%AE%E4%B8%80%E4%B8%AA%E8%B4%A8%E9%87%8F%E4%B8%BA10kg%E7%9A%84%E7%89%A9%E4%BD%93A%2C%E5%AE%83%E8%A2%AB%E6%8B%B4%E5%9C%A8%E4%B8%80%E4%B8%AA%E6%B0%B4%E5%B9%B3%E6%8B%89%E4%BC%B8%E7%9A%84%E5%BC%B9%E7%B0%A7%E4%B8%80%E7%AB%AF%2C%E4%B8%94%E5%A4%84%E4%BA%8E%E9%9D%99%E6%AD%A2%E7%8A%B6%E6%80%81%2C%E6%AD%A4%E6%97%B6%E5%BC%B9%E7%B0%A7%E7%9A%84%E6%8B%89%E5%8A%9B%E4%B8%BA5N.%E8%8B%A5%E5%B9%B3%E6%9D%BF%E8%BD%A6%E4%BB%8E%E9%9D%99%E6%AD%A2%E5%BC%80%E5%A7%8B%E5%90%91%E5%8F%B3%E5%81%9A%E5%8A%A0%E9%80%9F%E8%BF%90%E5%8A%A8%2C%E4%B8%94%E5%8A%A0%E9%80%9F%E5%BA%A6%E9%80%90%E6%B8%90%E5%A2%9E%E5%A4%A7%2C%E4%BD%86a%EF%BC%9C%3D)
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