本题目来源于试卷: newnewnewnew，类别为 IB物理学
[问答题]
You pull a box with q9tqy, mf 253,bgx9p:o(gq sr xi. lge7tus3n+ n c19pt3)yxkpp,w.7s*jt(o nc xjgq a constant force across a frictionless table using an attached rope held horizontally. If you now pull the rope with the same force at an angle to the horizontal (wi1 opy3p.* pqgj+s7n j)wcntxc(xt 9k,th 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:
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