Phys2A_F07_Lecture_02

# Phys2A_F07_Lecture_02 - • As long as the predictions of...

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W. P. Beyermann Fall 2007 1 Concepts of Motion How do you visualize motion? During this lecture, we will examine motion in detail. We will start with a literal picture and proceed to a much more abstract representation, containing a small subset of the system’s characteristics that are associated with the phenomenon of interest. This reductionism, which is an important aspect of science in general, is necessary for a quantitative formulation of the system.

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W. P. Beyermann Fall 2007 2 Motion Diagrams
W. P. Beyermann Fall 2007 3

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W. P. Beyermann Fall 2007 4 A model is a simplified substitution for the real problem that allows us to solve the problem in a relatively easy way. With it, you can make predictions about the behavior of the system. • The predictions will be based on interactions among the components and/or • Based on the interactions between the components and the environment.

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Unformatted text preview: • As long as the predictions of the model agree with the actual behavior of the real system, the model is valid. W. P. Beyermann Fall 2007 5 A good example is the particle model. Replace an extended object with a particle which has mass, but zero size. Two conditions must be satisfied for this model to be valid. 1. The size of the actual object is of no consequence in the analysis of its motion. 2. Any internal processes occurring in the object are of no consequence in the analysis of its motion. W. P. Beyermann Fall 2007 6 Particle Model Is this object moving to the right, left, or is there enough information to tell? W. P. Beyermann Fall 2007 7 W. P. Beyermann Fall 2007 8 Dust particle settling to the floor at constant speed. A rocket slowing to make a soft landing on mars. Ball dropped from the roof of a building. W. P. Beyermann Fall 2007 9...
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Phys2A_F07_Lecture_02 - • As long as the predictions of...

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