A vector has both magnitude and direction. Does it mean that anything that has magnitude and direction is necessarily a vector? The rotation of a body can be specified by the direction of the axis of rotation and the angle of rotation about the axis. Does that make any rotation a vector?
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# Answers-
a) No.
All physical quantities having magnitude and direction mustn't be vector.
Qualifying criteria for quantity to be called vector is following the law of vector addition.
For example, despite having magnitude as well as direction current is a scalar quantity.
b) No.
Rotation of a body about an axis is not a vector quantity coz it doesn't obey the law of vector addition.
Though, for small angle of rotation, law of vector addition is obeyed and thus can be considered as vector.
Hope that was useful...
I'll answer all questions one by one.
# Answers-
a) No.
All physical quantities having magnitude and direction mustn't be vector.
Qualifying criteria for quantity to be called vector is following the law of vector addition.
For example, despite having magnitude as well as direction current is a scalar quantity.
b) No.
Rotation of a body about an axis is not a vector quantity coz it doesn't obey the law of vector addition.
Though, for small angle of rotation, law of vector addition is obeyed and thus can be considered as vector.
Hope that was useful...
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