(2) Vectors

# (2) Vectors - Lecture 2 Vectors. What is a vector? A scalar...

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Lecture 2 Vectors.

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What is a vector? A scalar quantity is one that is represented by a single number. (Eg: Mass, length, time, temperature, volume.) vector is a quantity which has both magnitude and direction. (Eg: Displacement, velocity, force.) Direction: something like “Makes an angle of 36 ° with the horizontal as measured CCW” Notation: A or A (or A ) Magnitude (how long): | A | or A
Equal vectors : Moving from P to Q, and from R to S: x Q P x x S R x A B A = B Vector basics A -A Opposite vectors Moving from P to Q, and from Q to P. Unit vector ( Â ): magnitude equals one. A = A Â

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Vector addition : Moving from P, to Q, to R x Q P x x R A B C A B C = A - B C C = A + B Vector subtraction It’s an addition! A - B = A +( - B ) Visually: What do I have to add to B to get A?
ACT: Vector addition All the vectors below have the same magnitude. Which of the following arrangements will produce the largest resultant when the two vectors are added? 1. 2. 3.

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Components A vector can be thought of as the vector-sum of the projections along the coordinate axes.
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## This note was uploaded on 03/27/2008 for the course PHYS 221 taught by Professor Herrera-siklody during the Fall '08 term at Iowa State.

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(2) Vectors - Lecture 2 Vectors. What is a vector? A scalar...

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