10. Please determine the best answer concerning the unit vector a. Is oriented a

Question

10. Please determine the best answer concerning the unit vector a. Is oriented along an axis of the system of reference (for example i is along the ox b. Is oriented along an axis of the system of reference (for example i is along the ox c. Is oriented along an axis of the system of reference (for example i is along the ox d. Is oriented along an axis of the system of reference (for example i is along the ox e. Is oriented along an axis of the system of reference (for example i is along the ox axis). axis) and it is a vector because is lying along this axis (defines a direction). axis), it is a vector because is lying along this axis (defines a direction), and has a modulus equal with the unit. axis), it is a vector because is lying along this axis (defines a direction), has a modulus equal with the unit, and has no dimension. axis), it is not a vector because it is fully described by its modulus equal with the unit, and has no dimension.

Explanation / Answer

# d is corect here.

A Unit vector is a vector with magnitude of 1 and it it used only to show the direction of any given vector. Since it shows the direction of other vectors it is dimensionless.

Hence it is a non dimensional vector with magnitude 1.

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