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13 Cards in this Set
- Front
- Back
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vectors
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mathematical quantities which express both magnitude and direction
examples of vectors: weight, thrust, area, moment of force/torque, angular velocity, velocity, displacement, acceleration, force, momentum |
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scalars
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quantities that have no direction
examples of scalar: distance, speed, volume, temperature, time, mass, work, energy, power, density |
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position vector vs. displacement vector
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position vector is just the vector quantity; displacement vector is the change in position
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vector addition
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add two vectors, put the second vector's tail to the head of the first; the sum is then the vector that extends from the tail of the first vector to the head of the second
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coordinate system
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a framework for describing positions in space
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cartesian or rectangular coordinate system
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a pair of numbers (x,y) represents each point in a plane
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unit vectors
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any vector in a plane can be written as a sum involving the two unit vectors
(i, j, k hat) |
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simple laws of adding vectors
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for vector
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for vector
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instantaneous velocity vector
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instantaneous acc. vector
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r is the position vector
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