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Recall Newton's Three Laws of Motion, which are the most fundamental principles of physics that explain the movement of almost everything. Apply this previous knowledge into swimming.
1st Lawhttp://images.digopaul.com/wp-content/uploads/related_images/2015/09/09/inertia_2.jpg
Objects will continue to remain stationary or move at the same speed unless an unbalanced force acts upon them. Some sort of force needs to be applied that is pushing or pulling in swimming. (Woodford)
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2nd LawThe relationship with the object's mass and acceleration can be presented as: F=ma. Acceleration is produced when a force acts upon an object. The greater the mass of the object is, the greater the force applied is needed to accelerate an object. The longer you apply force, the bigger change in momentum. When you push/pull something, a static object starts moving or the object starts going faster than it already was. (Woodford)
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3rd Lawhttps://s-media-cache-ak0.pinimg.com/736x/db/5d/58/db5d586c9eba5c68e0638a0624cd8a12.jpg
For every action force, there is an equal but opposite reaction force. For example, by kicking from the wall, your body is propelled forward through the water. The very same concept applies to swimming strokes. In order to move forward through the water, you have to pull backwards with your arms. In order to stay at the surface of the water, you have to kick downwards with your legs. If you want to have an upright position, you have to clasp your hands together in front of you. (Woodford)
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