本题目来源于试卷: newnewnewnew，类别为 IB物理学
[问答题]
You pull a box with a constant force acrosl cuns1x324/cdd) wees a fr7w ru xjb ,qn+qw-d+q6ictionless table using an attached rope held horizontally. If you now pull the rope with the same force at an angle to tqqr7q jw+, d+x-bw6unhe horizontal (with the box remaining flat on the table), does the acceleration of the box (a) remain the same, (b) increase, or (c) decrease? Explain.
参考答案:
When you pull the rope at an angle, only the horizontal component of the pulling force will be accelerating the box across the table. This is a smaller horizontal force than originally used, and so the horizontal acceleration of the box will decrease.
本题详细解析:
暂无
| 
