【題目】在“DIS驗證牛頓第三定律”實驗中，把兩個 傳感器的掛鉤鉤在一起，向相反方向拉動，得到如圖乙所示的圖線。

（1）請在上述空格填上傳感器名稱。

（2）（多選題）根據(jù)圖線能得出的結(jié)論是 。

A．作用力和反作用力性質(zhì)相同

B．作用力和反作用力同時存在同時消失

C．作用力和反作用力大小相等方向相反

D．作用力和反作用力分別作用在兩個物體上

【答案】（1）力 （2）BC

【解析】（1）在“DIS驗證牛頓第三定律”實驗中，把兩個力傳感器的掛鉤鉤在一起，向相反方向拉動，得到如圖乙所示的圖線．

（2）觀察分析兩個力傳感器的相互作用力隨時間變化的曲線，可以看出作用力與反作用力一定大小相等，方向相反，作用力與反作用力大小一定同時變化，故選BC。

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