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					Physics
Physics-the study of
 matter and energy
 and the interaction
 between the two
 through forces and
 motion.
Careers in Physics
• Aerospace Engineer-Homer H.
• Camera Operator
• Computer Repair Technician
• Architect
• HVAC Technicians
• Electrician
Forces and Motion
• A force causes a
 resting object to
 move, or accelerates a
 moving object.
    Motion-a change
        of position
• Speed – the distance an
             sv




 object moves in a
 particular amount of
 time.
     60 miles/hour
•Acceleration-
changes in speed
       Friction
• A force that opposed the
 motion of objects
       Gravity
• Force that causes
 objects to accelerate
 downward toward the
 center of the earth.
Work, Power and
  Machines
        Work
• Force acting on an
object in the same
direction the object
moves.
Work=force x distance
         Power
• Work done in a given
 time
        Power = work
                time
     Machines
• Help us do work!
 Simple Machines
• Levers - crowbar
• Wheel & axle – steering wheel
• Inclined plane - ramp
• Wedges - knife
• Screws
• Pulleys-flagpole, window blinds
Compound Machines
• When 2 or more simple
 machines work together.

- car, bicycle, clock etc.

				
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