1. From the definition, it is clear that a displacement vector is a polar vector . 2. Continuing this way, it is straightforward to classify any vector as either a pseudovector or polar vector . 3. A number of quantities in physics behave as pseudovectors rather than polar vectors , including magnetic field and angular velocity. 4. With cylindrical co-ordinates, the motion is best described in polar form with components that resemble polar vectors . 5. This is an example of a general theorem : The curl of a polar vector is a pseudovector, and vice versa. 6. Ordinary vectors are sometimes called " true vectors " or " polar vectors " to distinguish them from pseudovectors. 7. The axis of a " binary " ( 180?) rotation quaternion corresponds to the direction of the represented polar vector in such a case. 8. The velocity vector is a displacement vector ( a polar vector ) divided by time ( a scalar ), so is also a polar vector. 9. The velocity vector is a displacement vector ( a polar vector ) divided by time ( a scalar ), so is also a polar vector . 10. Likewise, the momentum vector is the velocity vector ( a polar vector ) times mass ( a scalar ), so is a polar vector.
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