B Arm-wrestling -- question about forces

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In arm-wrestling, when hand A prevails over hand B, the force exerted by hand A on hand B does not exceed the force hand B exerts on hand A, in accordance with Newton's third law. The torque generated by hand A on hand B is greater than the torque hand B can generate against it. The concept of "strength" is often confused with force; however, force is the correct term in this context. Even if hand B stops pushing, the force it initially exerted remains until it gives up completely. Ultimately, hand A's ability to maintain force is limited by physical constraints such as power and the table's resistance.
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In the arm-wrestling, when the hand A prevails on the hand B, the force of A on B is greater than that of B on A?
 
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Luigi Fortunati said:
In the arm-wrestling, when the hand A prevails on the hand B, the force of A on B is greater than that of B on A?
No. That would violate Newton's third law. The torque on the arm of B from the force from A is greater than the torque on the arm of B that B is able to generate.
 
Luigi Fortunati said:
In the arm-wrestling, when the hand A prevails on the hand B, the force of A on B is greater than that of B on A?
No, see also this:
http://www.lockhaven.edu/~dsimanek/physics/horsecart.htm
 
A.T. said:
No, see also this:
http://www.lockhaven.edu/~dsimanek/physics/horsecart.htm
OK thanks.

Therefore the force exerted by the hand A (also of the strongest man in the world) on the hand B, can never exceed (not even a little) the strength that the hand B exerts on the hand A (therefore represents its maximum limit).
 
Luigi Fortunati said:
OK thanks.

Therefore the force exerted by the hand A (also of the strongest man in the world) on the hand B, can never exceed (not even a little) the strength that the hand B exerts on the hand A (therefore represents its maximum limit).
“Strength” is not a standard physics concept. Do not confuse it with force, which is.
 
Luigi Fortunati said:
OK thanks.

Therefore the force exerted by the hand A (also of the strongest man in the world) on the hand B, can never exceed (not even a little) the strength that the hand B exerts on the hand A (therefore represents its maximum limit).
I think you need to distinguish between the muscular force and the total force one hand exerts on the other.

For example.. the force B exerts on A could stay the same even if B gives up and stops pushing. If A keeps pushing with the same force then when B gives up hand B will start accelerating and that will make up for the loss of muscular force B was applying on A.

In practice hand A won't be able to maintain the same force on B for very long but while it can hand B will exert the same force on A. Eventually he table will get in the way or hand A will be power limited (power = force * velocity and the velocity is increasing).
 
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