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Newton's Laws of Motion
  
Isaac Newtonby paukrus on Flickr


Newton's Laws of Motion

 

Newton's laws of motion are three physical laws that describe the relationship between the forces acting on a body and its motion due to those forces.

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The Swing Carouselby Stig Nygaard on Flickr


First law:

 

The velocity of a body remains constant unless the body is acted upon by an external force.

 

 

 

A body at rest will remain at rest and a body in motion will remain in motion unless acted upon by an outside force.

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Ana Ivanovic - the backhandby sub_lime79 on Flickr


Second law:

 

The acceleration (a) of a body is parallel and directly proportional to the net force (F) and inversely proportional to the mass (m), i.e., (F = ma).

 

 

 

 

 

A greater force will cause more acceleration.  A smaller force will cause less acceleration.  A smaller mass will accelerate with less force.  A larger mass will accelerate with more force.

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Take off of Space Shuttle Atlantis (STS-117)by kmillard92 on Flickr

 

Third law:

 

The mutual forces of action and reaction between two bodies are equal, opposite and collinear.

 

 

 

 

 

For every action there is an equal and opposite reaction.

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