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Serway_PSE_quick_ch03

Serway_PSE_quick_ch03 - Physics for Scientists and...

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Physics for Scientists and Engineers, 6e Chapter 3 - Vectors
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Which of the following are vector quantities? 1 2 50% 50% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. your age, speed, mass 2. acceleration, velocity
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Scalars: your age, speed, mass. None of these quantities has a direction. Vectors: acceleration, velocity. For these quantities, the direction is necessary to specify the quantity completely.
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The magnitudes of two vectors A and B are A = 12 units and B = 8 units. Which of the following pairs of numbers represents the largest and smallest possible values for the magnitude of the resultant vector R = A + B ? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 14.4 units, 4 units 2. 12 units, 8 units 3. 20 units, 4 units 4. none of these answers
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The resultant has its maximum magnitude A + B = 12 + 8 = 20 units when vector A is oriented in the same direction as vector B . The resultant vector has its minimum magnitude A B = 12 – 8 = 4 units when vector A is oriented in the direction opposite vector B .
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