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This is a pretty good question and i have no clue for the answer, can someone help?
According to newtons third law , when a horse pulls on a cart, the cart pulls back with an equal force on the horse. If, in fact, the cart pulls back on the horse as the horse pulls forward on the cart, how is it possible for the horse to move the cart ?
sunman, you are right, charlotte doesnt make any sense, if the cart has no acceleration how can it move???
Think about what happens between the horse and the earth, the earth is hugely massive, so although the force on the earth is the same as the force on the horse, the earth only accelerates a little away from the horse, and the horse accelerates a lot faster away from the earth.
It's important to view the horse-earth-cart system as a whole, and not in individual parts.
What I meant by the cart not having acceleration, was that it isn't moving away from the horse on it's own. Because the cart is an inanimate (sp?) object, so it won't move unless the horse moves it.
Capuchin i think you are making the question a lot more complicated than it is. I think i kind of understand what charlotte is trying to say. but im still not certain that those are 100% correct, but atleast im starting to get an idea
Actually charlotte doesn't make sense and capuchin makes more sense. I had the exact same question in my physics class. Darn i can't remember the explanation. It had something to do with forces acting in different directions.
Edit: Capuchin i don't think the earth part plays any role in it. But you should know more since i believe your majoring in physics.
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