I have been studying videos of swimmers and find what was once called the "S" stroke has almost disappeard.
I have noticed that flyers use it. But crawl swimmers have modified it so much that it is almost gone.
Has it been replaced completely or was it an optical illusion? Did underwater film show us it did not exist.
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Still it all boils down to F = ma. If you aren't accelerating a mass, you aren't creating force.
Not all forces are the result of the acceleration of a mass. I think you are overlooking viscosity.
If you are pushing, the water is pushing back with an exact equal force.
Even working just with F=ma, any water you have accelerated is in turn running into further water that has not yet been accelerated.
As I said, drag your arm through the water at a constant speed, this will require force even if your arm is not accelerating.
Still it all boils down to F = ma. If you aren't accelerating a mass, you aren't creating force.
Not all forces are the result of the acceleration of a mass. I think you are overlooking viscosity.
If you are pushing, the water is pushing back with an exact equal force.
Even working just with F=ma, any water you have accelerated is in turn running into further water that has not yet been accelerated.
As I said, drag your arm through the water at a constant speed, this will require force even if your arm is not accelerating.
