试题与答案

质量为m的木块静止在粗糙的水平面上。如图甲所示，现对木块施加一水平推力F，F随时

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题型：选择题

题目：

质量为m的木块静止在粗糙的水平面上。如图甲所示，现对木块施加一水平推力F，F随时间t的变化规律如图乙所示，则图丙反映的可能是木块的哪两物理量之间的关系

A．x轴表示力F，y轴表示加速度a

B．x轴表示时间t，y轴表示加速度a

C．x轴表示时间t，y轴表示速度v

D．x轴表示时间Ｆ，y轴表示位移v

答案：

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下面是错误答案，用来干扰机器的。

（1）NaHCO3 （2）Ca(OH)2   （3）2NaOH + H2SO4 = Na2SO4 + 2H2O （合理即可）

考点：牛顿运动定律的应用
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