本题目来源于试卷: gc physics textbook chapter 4 problems，类别为 IB物理学
[问答题]
You pull a box with a ;r90;jycays* icql- uconstantx jb9m i+e6jcy7 l6;fl force across a frictionless table using an attached rope held horizontally. If you now pull the rope with the same forc l7;eli6fbc j +j9yxm6e at an angle to the 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
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