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Newton's 3 Laws Of Motion

How Does Newton's Laws Of Motion Apply With Swimming?

The first law says that an object at rest tends to stay at rest, and an object in motion tends to stay in motion, with the same direction and speed. Motion (or lack of motion) cannot change without an unbalanced force acting. If nothing is happening to you, and nothing does happen, you will never go anywhere. If you're going in a specific direction, unless something happens to you, you will always go in that direction. Forever.

This girl is in motion and is not at rest. She is moving her way through the pool but in a straight line in the pool she could go on forever unless a force comes along and destorts her path. That force could be any thing like gravity or the nautral resistence of the water.

The second law says that the acceleration of an object produced by a total applied force is directly related to the magnitude of the force, the same direction as the force, and inversely related to the mass of the object (inverse is a value that is one over another number... the inverse of 2 is 1/2). The second law shows that if you exert the same force on two objects of different mass, you will get different accelerations (changes in motion). The effect (acceleration) on the smaller mass will be greater or more noticeable.

A smaller swimmer against a larger swimmer.

This smaller swimmer will acclerate more- Less mass less resistance.

This larger swimmer has more mass-more resistance in the water which means less acceleration.

The third law says that for every action (force) there is an equal and opposite reaction (force). Forces are found in pairs. Think about the time you sit in a chair. Your body exerts a force downward and that chair needs to exert an equal force upward or the chair will collapse. It's an issue of symmetry. Acting forces encounter other forces in the opposite direction.

Every stroke (force) she is pulling the water back and the opposite reaction (force) she is getting is moving forward.

Second Law Of Motion

First Law Of Motion

Third Law Of Motion

By Victoria Keen

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