图(1)表示用水平恒力F拉动水平面上的物体,使其做匀加速运动。

图(1)表示用水平恒力F拉动水平面上的物体,使其做匀加速运动。当改变拉力的大小时,相对应的匀加速运动的加速度a也会变化,a和F的关系如图(2)所示。

(1)该物体的质量为多少?

(2)在该物体上放一个与该物体质量相同的砝码,保持砝码与该物体相对静止,其他条件不变,请在图2的坐标上画出相应的a——F图线。

(3)由图线还可以得到什么物理量?(要求写出相应的表达式或数值)

答案


解析:

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