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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) 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 • Vector – physical quantity that has magnitude and direction • Examples velocity, acceleration • Multiplying vectors by a scalar results in a vector quantity
2 meters 1 meter Vectors • Vector symbol = “ “ over the abbreviation and direction • Length of the vector in a diagram = magnitude
Vectors • Vectors can be added graphically but only if the units and measured quantities are similar
Vectors • Resultant vector – vector representing the sum of 2 or more vectors • Draw vectors to scale • Add or subtract by head to tail method
Vectors • Properties of vectors - 2 vectors act at the same point - Resultant vector has the net effect of both component vectors - Triangle method
Vectors • Vectors can be added in any order because they are independent of each other • Subtract by adding a vector of opposite sign