Why action and reaction forces are not equal while walking on water?
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Actually, this isn't happening.
You might have a reasonably strong arm and be able to push on a scale with a force of 10 pounds. Then I give you a single feather and ask you to apply 10 pounds of force to it. You won't be able to. The feather will accelerate so quickly, that it doesn't supply such a strong force/resistance to your arm.
The same thing is happening with the water. When you try to push down on it with your feet, the water accelerates away instead of pushing back (very strongly) to you.
So the third law is working and both you and the water are exerting a force on each other. The problem for you walking is that the force is less than MG......
You might have a reasonably strong arm and be able to push on a scale with a force of 10 pounds. Then I give you a single feather and ask you to apply 10 pounds of force to it. You won't be able to. The feather will accelerate so quickly, that it doesn't supply such a strong force/resistance to your arm.
The same thing is happening with the water. When you try to push down on it with your feet, the water accelerates away instead of pushing back (very strongly) to you.
So the third law is working and both you and the water are exerting a force on each other. The problem for you walking is that the force is less than MG......
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Hello mate here is your answer.
Jiminion Jan 17 at 16:37
The issue you face here is the fact that your weight is more force than the surface tension of the water can oppose. The ability of objects to give back a normal force equal to your weight is contingent on if they are able to take the pressure. To reconcile this with the third law, consider that the system your talking about is not as simple as examples with solids. You have the water being compressed and moved and being sucked over your foot because of the negative pressure there. It's a more complicated problem.
Hope it helps you.
Jiminion Jan 17 at 16:37
The issue you face here is the fact that your weight is more force than the surface tension of the water can oppose. The ability of objects to give back a normal force equal to your weight is contingent on if they are able to take the pressure. To reconcile this with the third law, consider that the system your talking about is not as simple as examples with solids. You have the water being compressed and moved and being sucked over your foot because of the negative pressure there. It's a more complicated problem.
Hope it helps you.
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