Question

1. Let A be a unit vector along the axis of rotation of a
purely rotating body and B be a unit vector along the
velocity of a particle P of the body away from the axis.
The value of A.B is​

Answer 1

Answer:

Unit vector A along the axis of rotation of a purely rotating body is prependicular to unit vector B along the velocity of a particle P of the body away from the axis.

angle between them=Ѳ 90°

A.B = |A| |B| Cos 90°

[cos 90° = 0 ]

A.B = |A| |B| × (0)

A.B = 0

Thus,the value of A.B is 0.