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Newtons 1st Law The Law of Inertia

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Newtons 1st Law The Law of Inertia Powered By Docstoc
					 Newton’s1st

Law: The Law
  of Inertia
       Inertia
The  tendency of
an object to resist
a change in its state
of motion.
       Force
Something that
causes a change in
the state of motion
of an object.
         Mass
The   amount of matter
 an object contains.
A measurement of the
 inertia of an object.
    Law of Inertia
  (Newton’s 1 st Law)

An object will
maintain its state of
motion unless there is
a net unbalanced
force on it.
              Types of Forces
 Contact   Forces
   Applied-push or pull     Action at a
   Tension-support from
    string                    distance forces
   Friction-between           Gravity
    surfaces,opposes           Electrical
    motion                     magnetic
   Normal-perpendicular
    support force
   Air resistance-opposes
    motion
   Spring-restoring force
Free Body Diagrams


           QuickTime™ an d a
       TIFF (LZW) decompressor
    are need ed to see this picture.
      Weight
A  measure of the
force of gravity on
an object
     Weight equations
Weight  mg
                  Gm1m2
Force of Gravity    2
                   d
    Net Force
The   vector sum of
all forces acting on
an object.

				
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posted:10/16/2012
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