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Instantaneous Axis of Rotation

Let A⃗ be a...

Question

Let $\to A$ be a unit vector along the axis of rotation of a purely rotating body and $\to B$ be a unit vector along the velocity of a particle P of the body. The value of $\to A$ . $\to B$ is

A

1

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B

- 1

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C

0

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D

None of these

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Solution

The correct option is D $0$
As $\to A$ and $\to B$ are perpendicular to each other.
Thus $\to A . \to B = 0$

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