Holt Physics Chapter 3 - Holt Physics Chapter 3Two-dimensional Motion and Vectors I Section 3-1Introduction to Vectors A Scalars and Vectors 1 Magnitude

Holt Physics Chapter 3 - Holt Physics Chapter...

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Holt Physics Chapter 3—Two-dimensional Motion and Vectors I. Section 3-1—Introduction to Vectors A. Scalars and Vectors 1. Magnitude and Direction a. In chapter 2 we discussed velocity. Velocity has both a magnitude and a direction. b. Magnitude: a measurement represented by a number (e.g. -12 meters/second) c. Direction: an indication of orientation. For velocities we use a positive number for right or up and a negative number for left or down. 2. Velocity is an example of a VECTOR . Vectors always have both a direction and a magnitude a. Vectors are differentiated from scalars in your book by using BOLD type. b. Vectors are also represented by arrows. The longer the arrow the more magnitude the vector has. 3. Speed is an example of a SCALAR . Scalars only have a magnitude. B. Properties of vectors 1. Vectors can be added graphically a. When adding vectors, you must make sure that they have the same units and describe similar quantities. b. The answer found by adding vectors together is called the resultant . (insert fig 3-2 here) c. Vectors can only be moved parallel to themselves in a diagram. (see fig 3.3 on p.86) II. Section 3-2—Vector Operations A.
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  • Spring '13
  • Dr.Alo
  • Physics, Force, Trajectory, Velocity, Trajectory of a projectile

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