When we were swimming this morning, I was aware of the thrust and drag forces that are included in this sport. Drag comes from the front of the swimmer being exposed to the water. Drag is reduced by thrust and the kicking of the swimmer. Thrust is mostly produced by the swimmer when kicking and by moving his arm through the water; by pushing the water back with the palm of his hand. That's why it's more efficient to swim with the palm of the hand closed instead of open. This way, the swimmer can push back water more efficiently.
No comments:
Post a Comment