A force is any push or pull on an object

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					A force is any push or pull on an
             object.
 The units for force are Newtons (N) they are
              equal to a kg m/s2.
                     F = ma

Weight is equal to mass times acceleration of
                   gravity.
                   Fg = mg
Mass is measured in kg and does not change as
 height changes. Weight does get less as you
     move away from the center of Earth.
                 Isaac Newton
• Newton’s 3 laws
  – 1st : Law of Inertia An object at rest
    will stay at rest, an object in motion will
    stay in motion, unless acted upon by an
    outside force.
  – 2nd : F = ma An object will accelerate
    in the presence of an unbalanced force.
    The larger the mass the smaller the
    acceleration.
  – 3rd : For every action there is an equal
    and opposite reaction.

				
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posted:5/28/2012
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