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प्रश्न
Let \[\overrightarrow A\] be a unit vector along the axis of rotation of a purely rotating body and \[\overrightarrow B\] be a unit vector along the velocity of a particle P of the body away from the axis. The value of \[\overrightarrow A.\overrightarrow B\] is ____________ .
विकल्प
1
-1
0
None of these
उत्तर
0
For a purely rotating body, the axis of rotation is always perpendicular to the velocity of the particle.
Therefore, we have
\[\overrightarrow A.\overrightarrow B=0\]
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