本题目来源于试卷: Linear Momentum，类别为 IB物理学
[问答题]
If only an external 8pqfj/7vxx0fe *lpb g)+ zrxp;f -2nsforce can change the momentum of the center of mass of an obxr80 f p f7bpe;+xxsz 2f pg)lv-/nj*qk n ,qp0qqp a:u3s547wqup 3mqject, how can nup:430sq kqa q5,3umqqp7wp the internal force of an engine accelerate a car?
参考答案:
The engine does not directly accelerate the car. The engine puts a force on the driving wheels, making them rotate. The wheels then push backwards on the roadway as they spin. The Newton’s $3^{rd}$ law reaction to this force is the forward-pushing of the roadway on the wheels, which accelerates the car. So it is the (external) road surface that accelerates the car.
本题详细解析:
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