Hi all.
Do we have to OPEN or CLOSE our fingers when are swimming freestyle, I mean in catch n pull stage?
May I ask why?
Thank you very much.
Parents
Former Member
Originally posted by geochuck
Are we moving the hand through the water or are we using newtons third law? Are we actuaully pressing against that imaginary wall that is actually a wall of water?
It isn't an either/or situation, Newton's third law applies in all ordinary situations but if you don't move your hand through the water you don't generate any forces beyond normal water pressure which acts from all directions and cancels out.
One the one hand you can try to feel like you are grabbing water and pulling yourself past it without your arm slipping/moving backward, and that can be useful for learning the motion, but in reality it is impossible, if you arm is not moving through the water it isn't generating any propulsion. Looking at it the other way, it is a basic property of fluids that if you apply force movement occurs.
Originally posted by geochuck
Are we moving the hand through the water or are we using newtons third law? Are we actuaully pressing against that imaginary wall that is actually a wall of water?
It isn't an either/or situation, Newton's third law applies in all ordinary situations but if you don't move your hand through the water you don't generate any forces beyond normal water pressure which acts from all directions and cancels out.
One the one hand you can try to feel like you are grabbing water and pulling yourself past it without your arm slipping/moving backward, and that can be useful for learning the motion, but in reality it is impossible, if you arm is not moving through the water it isn't generating any propulsion. Looking at it the other way, it is a basic property of fluids that if you apply force movement occurs.
