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Describing Motion

Describing Motion. Picturing Motion. Motion Diagrams A series of images of a moving object. Particle Model. Particle Model Replacing an object by a single point. Example  Ticker Timer Lab. Vectors and Scalars. A quantity that has only magnitude is referred to as a scalar quantity

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Describing Motion

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  1. Describing Motion

  2. Picturing Motion • Motion Diagrams • A series of images of a moving object

  3. Particle Model • Particle Model • Replacing an object by a single point. • Example  Ticker Timer Lab

  4. Vectors and Scalars • A quantity that has only magnitude is referred to as a scalar quantity • A quantity that has magnitude and direction is referred to as a vector quantity • The arrow head indicates direction, while the length of the arrow indicates magnitude

  5. Vector Diagrams • Interpret the motion of the following diagram. • What would a gradually increasing velocity vector look like? Draw it.

  6. Time Intervals and Displacement • Displacement is the change in position of an object (defines the distance and direction between two positions) • Therefore d =df - di • Time interval is the difference between ti and tf • Therefore t =tf – ti

  7. Velocity and Acceleration • Average Velocity • Simply the slope of a Position vs. Time Graph • V = d / t = (df – di) / (tf – ti) • Average Acceleration • Simply the slope of a Velocity vs. Time Graph • a= v / t = (vf – vi) / (tf – ti)

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