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题目(2014·苏州)如图1所示,物体在重力、支持力和摩擦力作用下沿水平面向右做减速直线运动,假如在运动过程中重力突然消失,物体将( )A.立即停止运动B.向右沿水平方向做减速直线运动直至停止C.向右沿水平方向做匀速直线运动D.向右上方做匀速直线运动该试题的正确答案为C选项。当时请学生分组讨论,总结小组结论。小组讨论后,绝大多数小组选择C,笔者要求学生说明选择理由。学生的回答是:假如重力消失,则支持力会同时消失,
Subject (2014 · Suzhou) As shown in Figure 1, the object decelerates linearly to the right along the horizontal plane under the action of gravity, supporting force and friction. If the gravity suddenly disappears during the movement, the object will stop moving immediately B. Decelerate linearly to the right to the right until stopped C. Do the straight line to the right in the horizontal direction at a constant speed D. Do the straight line to the right at the top. The correct answer to this question is C option. At that time, students were asked to group discussions to summarize the conclusions of the group. After the group discussion, the vast majority of groups choose C, I asked students to explain the reasons for choice. The student’s answer is: If the gravity disappears, the support force will disappear at the same time,