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[Phy] Action and reaction force 一問

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Action and reaction force 一問

求大家解答A farmer asks his horse to pull a carriage of goods. The horse refuse.
It says whenever it pulls the carriage, the carriage pulls it back with an equal force.
So the net force is zero and it can never move the carriage.
Is this true? If you were the farmer, how would you reply the horse?
   

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False.
Newton's thrid law of motion 講過action reaction pair 係 same magnitude 同 opposite direction (即係唔會act on same object),
carriage會唔會move,係睇個force acting on the carriage by the horse 大唔大得過static friction嘅magnitude

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回覆 2# JasonFung0310 的帖子

明白晒,多謝你

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