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Kinematics (Part 1)

Kinematics (Part 1). What is kinematics?. Kinematics = the study of motion & how to describe it. Motion = a change in position Can be… straight circular arced back&forth. How to detect / display motion.

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Kinematics (Part 1)

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  1. Kinematics (Part 1)

  2. What is kinematics? Kinematics = the study of motion & how to describe it. Motion = a change in position Can be… straight circular arced back&forth

  3. How to detect / display motion • Motion Diagram – series of images of a moving object that records position at equal time intervals • Motion is observed based on a motionless object • Can show objects at rest, constant speed, speeding up or slowing down

  4. How to detect / display motion (cont.) • How can you show objects at rest, constant speed, speeding up or slowing down? • Particle diagram – shows same thing, easier to draw • At rest (no motion) • • Constant speed (distance stays the same) • • • • • • Speeding up (distance increases) • • • • • • Slowing down (distance decreases) • • • • •

  5. Motion based on Frame of Reference • Motion can / will appear to be different based on your “Frame of Reference” (f.o.r.) • F.O.R. – one’s point of view Ex. #1 Motion of the planet Mars (f.o.r. = Earth) Ex. #2 Motion of the planet Mars (f.o.r. = Sun)

  6. How to describe motion • Once you decide where / when to measure a position change, you must set up a coordinate system. • Coordinate systems tell you the origin,magnitude and direction of the motion. (We’ll discuss further later) • Origin = zero point • Scalar quantity – describes magnitude (represented with a letter, Ex. s, m, °C) • Vector quantity – describes magnitude and direction (represented with a letter and arrow, Ex. v )

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