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2-D motion (no projectiles – yet)

2-D motion (no projectiles – yet). Physics Chapter 3 section 1 Pages 84-87. Scalars and Vectors. Scalar – physical quantity that has only magnitude, but no direction Examples  number of people on a bus  volume  pages in a book. Scalars and Vectors.

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2-D motion (no projectiles – yet)

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  1. 2-D motion (no projectiles – yet) Physics Chapter 3 section 1 Pages 84-87

  2. Scalars and Vectors • Scalar – physical quantity that has only magnitude, but no direction • Examples  number of people on a bus  volume  pages in a book

  3. Scalars and Vectors • Vector – physical quantity that has magnitude and direction • Examples  velocity, acceleration • Multiplying vectors by a scalar results in a vector quantity

  4. 2 meters 1 meter Vectors • Vector symbol = “  “ over the abbreviation and direction • Length of the vector in a diagram = magnitude

  5. Vectors • Vectors can be added graphically but only if the units and measured quantities are similar

  6. Vectors • Resultant vector – vector representing the sum of 2 or more vectors • Draw vectors to scale • Add or subtract by head to tail method

  7. Vectors

  8. Vectors • Properties of vectors - 2 vectors act at the same point - Resultant vector has the net effect of both component vectors - Triangle method

  9. Vectors • Vectors can be added in any order because they are independent of each other • Subtract by adding a vector of opposite sign

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